List of reviews, popular articles and original papers


Reviews in Polish

Reviews in English

Popular articles and books

Orginal papers



Reviews
(in Polish)

  1. Krygowski T. M., Grzegorczyk M.,: "Teoretyczne uzasadnienie" metody Rozdział w monografii Krygowski B., Graniformametria mechaniczna, Teoria i zastosowanie, PTPN, Poznań 1964 str. 28-40
  2. Krygowski T. M., Wiad.Chem. 28, 37, 1974. Równanie Hammetta-Steitwiesera.
  3. Krygowski T. M., Rozprawy Uniwersytetu Warszawskiego. (1974) Przejawy zmian strukturalnych we wlaściwościach fizykochemicznych cząsteczek związków π-elektronowych.
  4. Krygowski T. M., Kruszewski J., Wiad. Chem. 29, 113, 1975. Definicje i kryteria indeksów aromatyczności.
  5. Krygowski T. M., Lipsztajn M., Wiad. Chem. 31, 729, 1977. Rola środowiska reakcji w elektroredukcji nitrozwiązków aromatycznych.
  6. Krygowski T. M., Kruszewski J., Ilościowe kryteria aromatyczności. Monografia Prace Nauk. Inst.Chemii Org. i Fiz. Politechniki Wrocławskiej, Wrocław (1978).
  7. Krygowski T. M., Czermiński J. B., Wiad. Chem., 32, 547, 1978. Chemiczne modele efektu rozpuszczalnikowego.
  8. Czermiński J. B., Krygowski T. M., Wiad. Chem. 32, 259, 1978. Fizyczne modele efektu rozpuszczalnikowego.
  9. Krygowski T. M., Wrona T.K., Statystyczne opracowanie danych doswiadczalnych str. 38 w Elektroanalityczne metody wyznaczania stalych fizykochemicznych pod red. Z.Galus, PWN Warszawa 1979.
  10. Krygowski T. M., Lasia A., Wyznaczanie stałych równowagi reakcji chemicznych metodami elektrochemicznymi str. 129 j.w.
  11. Krygowski T. M., Wiad. Chem. 35, 315, 1981. O relacjach między strukturą a reaktywnością.
  12. Krygowski T. M., Wiad. Chem. 41, 7, 1987. Analiza korelacyjna w krystalochemii organicznej.
  13. Krygowski T. M., Wiad. Chem. 43, 861, 1989. Co krystalografia może dać chemikowi.
  14. Krygowski T. M., Woźniak K.,Wiad. Chemiczne, 46, 4353, 1992. Strukturalne skutki wiązania wodorowego.
  15. Cyrański, M. K., Krygowski, T.M., Wiad. Chemiczne, 54, 533, 2000, Ilościowe kryteria aromatyczności.
  16. Cyrański, M. K., Krygowski, T.M., Wiad. Chemiczne, 54, 533, 2000, Aromatyczność - podstawowe pojęcie współczesnej chemii organicznej.

Reviews
(in English)

  1. Kemula W., Krygowski T. M., Chapt. XIII-2, Nitroso compounds, in Encyclopedia of Electrochemistry of the Elements Vol.13 p. 78-130, A.J.Bard and H.Lund Edts. M.Dekker (1979)
  2. Kemula W., Krygowski T. M., Chapt.XIII-3, Nitroso compounds, in Encyclopedia of Electrochemistry of the Elements Vol.13, p. 131-161, A.J.Bard and H.Lund Edts. M.Dekker (1979)
  3. Kalinowski M. K., Krygowski T. M. Croat. Chim Acta 58, 107 (1985) Application of the LFER in Organic Electrochemistry: Interpretation of the Hammett Reaction Constant (rho) for Processes of Reversible Electroreduction in Aprotic Solvents.
  4. Krygowski T.M., Structure and Reactivity Edt. J. L. Liebman and A. Greenberg, (VerlagChemie, 1988) 231-254. Resonance structure contributions derived from the experimental geometry of molecules.
  5. Krygowski T. M., Progr. in Phys. Org. Chem. Vol. 17, Edt. R.W. Taft (1990) 239-291, Correlation analysis in organic crystal chemistry.
  6. Krygowski T. M. & Wozniak K. in Similarity models in organic chemistry, biochemistry and related fields. Edts. R. I. Zalewski, T. M. Krygowski & J. Shorter, Elsevier (1991). Similarity models: statistical tools and problems in using them.
  7. Krygowski, T. M. Organic crystal chemistry. Edited by J. B. Garbarczyk and D. W. Jones, Oxford Univ. Press (1991), 55-73. Crystallographic studies of inter and intramolecular interactions.
  8. Krygowski T. M., Wozniak, K. in The Chemistry of Amidines and Imidates. Edt. by S. Patai and Z. Rappaprt, (1991), Vol.2, 102-145. Structural chemistry of amidines and related systems.
  9. Woźniak K., Krygowski T. M., in Correlations, transformations, and interactions in organic crystal chemistry. Edt. by D.W.Jones and A. Katrusiak Oxford Univ. Press (1994), 177-202. Long-range consequences of hydrogen bonding: a partial correlation approach to relationships among structural parameters.
  10. Exner O., Krygowski T. M., Chem. Soc. Rev. (1996), 71. The Nitro Group as Substituent.
  11. Krygowski T.M. and Cyranski M.K., in Advances in Molecular Structure Research, JAI Pres Inc. 1997, M. Hargittai and I. Hargittai Edts, vol. 3,: "Aromatic Character of carbocyclic π-electron systems deduced from molecular geometry". pp.227- 268.
  12. Krygowski T. M. and Cyranski M.K., in Theoretical and Computational Chemistry Elsevier Science, 1998, C. Parkanyi Ed., Vol. 5 " Molecular Geometry as a Source of Chemical Information for π-Electron Compounds" pp. 153 - 187.
  13. Krygowski, T.M., Cyrański, M.K., Czarnocki, Z., Haefelinger, G., Katritzky, A.R., Tetrahedron, 56, 1783, 2000. Aromaticity: a theoretical concept of immense practical importance.
  14. Krygowski, T.M., Cyrański, M.K., Chem. Rev. 101, 1 (2001) Structural aspects of aromaticity.
  15. Grabowski, S. J., Krygowski, T.M., in: Advances in Quantitative Structure - Property Relationships; Marvin Charton and Barbara Charton, Edts, JAI - Elsevier 2002; vol. 3, pp. 27 - 66. "Molecular Geometry as a Source of Chemical Information - Application of the Bond Valence - Bond Number Models" 2003
  16. Krygowski, T. M., Cyrański, M. K., Angular Group Induced Bond Alternation (AGIBA). A New Face of Substituent Effetc Detected in Molecular Geometry. Synlett, 7, 922 - 36, 2003.
  17. Krygowski, T.M., Cyrański, M.K., Phys.Chem. Chem. Phys. 2004, 6, 249 - 55, , Two faces of the structural aspects of aromaticity.
  18. Krygowski, T. M., Stępień, B. T., Chem. Rev. 2005, 105, 3482, Sigma and Pi- Electron Delocalization: Focus on Substituent Effects.
  19. Sobczyk, L., Grabowski, S. J., Krygowski, T.M., Chem. Rev. 2005, 105, 3513 Interrelation Between H-Bonding and p-Electron Delocalization
  20. Krygowski, T.M.; Zachara J.E., Distant Consequences of Hydrogen Bonding. S.J.Grabowski Ed., in: Challenges and Advances In Computational Chemistry and Physics, Vol. 3 Hydrogen Bonding - New Insights. Pp. 417 - 39. 2007
  21. Krygowski, T. M., Szatyłowicz, Research Trends - Trends In Organic Chemistry, Interrelation between the substituent effects, pi-electron delocalization and H-bonding.


Popular articles and books

  1. Krygowski T. M., Chemia w szkole, (1993),1, (196) XXXIX, 5 - 11, Ewolucja poglądów na aromatyczność.
  2. Krygowski T.M., Chemia w szkole, (1994), (202) XL, 67-77. Czy można zobaczyć wiązanie chemiczne?
  3. Krygowski, T.M., Oficyna Edukacyjna Krzysztof Pazdro, Warszawa, 1994. 1-91,Chemia wokół nas,
  4. Krygowski, T. M., Niedziałki, 2005, XI, 27. Czy chemia nas truje?


Original papers

  1. Krygowski B., Krygowski T. M., J. Sed. Petrology, 35, 496, 1965. Mechanical Method of Estimation of the Abrasion Grade of sand Grains.
  2. Kemula W., Krygowski T. M., Bull. Acad. Polon. Sci. Chim., 15, 479, 1967. The Effective Inductive Parameter Model of the Substituent Influences in Huckel Molecular Orbital Theory. Mono-substituted Antharaquinones.
  3. Kemula W., Krygowski T. M., Tetrahedron Letters, 5135, 1968, Substituent Effects in Poorly Aromatic Systems; Dichloro -anthraquinones and Related Semiquinone Radicals.
  4. Kruszewski J., Krygowski T. M., Tetrahedron Letters, 319, 1970, A Quantum Chemical Approach to the Definition of Aromaticity.
  5. Krygowski T. M., Tetrahedron Letters, 1311, 1970, Aromaticity and Classification of pi-Electron Systems.
  6. Krygowski T. M., Tomasik P., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 18, 303, 1970. HMO-EIP Interpretation of Substituent Effects in Polarography of some Aromatic Nitro- and Azo-Compounds.
  7. Kemula W., Kalinowski M. K., Krygowski T. M., Lewandowski J., Walasek W., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 18, 455, 1970. Investigation of N-Nitroderivatives. Equlibria of Nitrourea and Nitroguanidine in Aqueous Solutions.
  8. Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 18, 463, 1970. HMO-Interpretation of the Hammett-Substituent Constants in Para Position. A new method of Verification of Parameters for HMO-Heteroatom Integrals.
  9. Kuthan J., Krygowski T. M., Tetrahedron. Letters, 4109, 1970. HMO-Perturbational Considerations of Correlations between Chemical Shifts and some Theoretical Indices of Reactivity.
  10. Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 19, 49, 1971. Extension of the Hammett-Equation on the Polynuclear Benzenoid Hydrocarbons: the Hammett-Streitwieser Equation.
  11. Krygowski T. M., Bull. Acad.Polon. Sci., Ser.Chim., 19, 61, 1971. Extension of the Hammett Equation on the Monosubstituted Polynuclear Benzenoid Hydrocarbons- Extended Hammett-Streitwieser Equation.
  12. Kamieński B., Krygowski T. M., Tetrahedron Letters, 103, 1971. HMO-EIP Treatment of the NMR Proton Chemical Shifts of Monosubstituted Thiophenes.
  13. Krygowski T. M., Bull. Acad. Sci., Ser. Sci. Chim., 19, 433, 1971. Hammett-Streitwieser Equation: The Principle of Additivity.
  14. Krygowski T. M., Bull. Acad. Sci., Ser. Sci. Chim., 19, 753, 1971. Hammett-Streitwieser Equation: Application to Charge Transfer Spectra of Benzenoid Hydrocarbons.
  15. Krygowski T. M. Bull. Acad. Sci., Ser. Sci. Chim., 19, 743, 1971. A Quantum-Chemical Interpretation of Hammett s RHO constants: The Case of Polarographic Reversible Processes.
  16. Krygowski T. M., Stencel M., Galus Z., J.Electroanal.Chem. 39, 395, 1972. Polarographic and Voltametric Study of Monosubstituted Nitro-Derivatives of Benzenoid Hydrocarbons in DMF-Interpretation within Hammett-Streitwieser Equation and HMO Theory.
  17. Kruszewski J., Krygowski T. M., Tetrahedron Letters, 3839, 1972. Harmonical Oscillator Approach to the Definition of Aromaticity.
  18. Kamieński B., Krygowski T. M., Tetrahedron Letters, 681, 1972. Application of the Hammett-Streitwieser Equation to Interpretation of the Chemical Shifts of Nonaromatic Protons in Substituted Arenes.
  19. Krygowski T. M., J. Electroanal. Chem. 39, 436, 1972. An Empirical Equation of 1,2- and 1,4-Naphtoquinones in the Presence of Ion Paring Phenomena
  20. Krygowski T. M., Tetrahedron, 28, 491, 1972. Towards the Unification of the Substituent (Position) Constants in Hammett- Streitwieser Equation.
  21. Kruszewski J., Krygowski T. M., Bull. Acad. Polon. Sci Ser., Sci Chim., 20, 993, 1972. An Empirical Approach to the Definition of Aromaticity of the Benzenoid Hydrocarbons- Application of the Hammett-Streitwieser Equation.
  22. Kruszewski J., Krygowski T. M., Bull. Acad. Polon. Sci Ser., Sci Chim., 20, 907, 1972. Definition of Aromaticity Based on the Harmonic Oscillator Model.
  23. Kruszewski J., Krygowski T. M., Soc. Sci. Lodz.Acta Chimica, 18, 35, 1973. An Attempt to Verification of the Aromaticity Indices.
  24. Krygowski T. M., Lipsztajn M., Galus Z., J.Electronical.Chem. 41, 261, 1973. Ion Pair Formation Effects in the Revesible Electroreduction of Nitrobenzene in DMF.
  25. Krygowski T. M., Kruszewski J., Bull.Acad.Polon.Sci., Ser. Sci. Chim., 21, 409, 1973. Bond Reactivity Index (BRI) in Terms of Harmonic Oscillator Theory.
  26. Krygowski T. M., Kruszewski J., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 21, 509, 1973. Aromaticity of Annulenes in Terms of some Theoretical and Experimental Indices of Aromaticity.
  27. Krygowski T. M., J. Mol. Struct., 17, 168, 1973. CC-bond Lengths in Radicals Molecules from ESR-spectral Data.
  28. Tomasik P., Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci. Chim., 22, 443, 1974. Hammett- Type Approach to the Substituent Effects in the UW Absorption Spectra of Aromatic Compounds. Part I. The Spectra of para-Disubstituted Benzene Derivatives.
  29. Tomasik P., Krygowski T. M., Chellahatturai T., Bull. Acad. Polon. Sci., Ser. Sci. Chim. 22, 877, 1974. Part.II. The Spectra of meta-Disubstituted Benzene Derivatives.
  30. Tomasik P., Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci. Chim .22, 1065, 1974. Part III. The Spectra of ortho-Disubstituted Benzene Derivatives.
  31. Krygowski T. M., Kruszewski J., Bull. Acad. Polon. Sci., Ser. Sci. Chim .22, 1059, 1974. Application of the Hammett-Streitwieser Equation to the Prediction of para-Bond Location in the UV Spectra of Benzenologues of Perylene and Fluoranthenes.
  32. Krygowski T. M., Kruszewski J., Bull.Acad.Polon.Sci., Ser. Sci. Chim., 22, 871, 1974. Aromaticity of Tiophene, Pyrrole and Furan in Terms of Aromaticity Indices and Hammett RHO Constants.
  33. Lipsztajn M., Krygowski T. M., Galus Z., J.Electroanal.Chem. 49, 17, 1974. Polarographic Investigations of the Interactions between Nitrobenzene Radical Anions, Water and Univalent Cations in DMF/ Water Mixtures.
  34. Krygowski T. M., Perjessy A., Bull.Acad.Polon Sci., Ser. Sci. Chim., 22, 437, 1974. Interpretation of the Hammett RHO Constant within the Simple HMO Theory.
  35. Lipsztajn M., Krygowski T. M., Laren E., Galus Z., J. Electroanal. Chem., 54, 315, 1974. Electochemical Investigations of Intermediate in Electro-reduction of Aromatic Nitro- and Nitroso- Compounds in DMF. Part.I. Electro-chemical Behaviours of Azoxybenzene.
  36. Lipsztajn M., Krygowski T. M., Laren E., Galus Z., J. Electroanal. Chem., 57, 339, 1974. Part II. Electrochemical Behaviour of Nitrobenzene.
  37. Kruszewski J., Krygowski T. M., Can. J. Chem., 53, 946, 1975. An Extension of the Hückel 4N+2 Rule to Polycyclic Nonalternant Conjugated Hydrocarbons.
  38. Krygowski T. M., Lipsztajn M., Radzikowski P., J. Mol. Structure. 28, 163, 1975. Quantum Chemical Approach to the Ion Pair Formation /IPF/ Equlibrium Constants of Nitrobenzene Radical Anions with Univalent Cations and Water Molecules.
  39. Krygowski T. M., Fawcett R. W., J. Am. Chem. Soc., 97, 2143 1975. A Complementary Lewis Acid-Base Description of Solvent Effects. Part.I. Ion-Ion and Ion-Dipole Interactions.
  40. Fawcett W.R., Krygowski T. M., Austr. J. Chem., 28, 2125, 1975. Part II. Dipole-Dipole Interactions.
  41. Kruszewski J., Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci. Chim. 23, 821, 1975. Quasiaromaticity and Quasiantiaromaticity. The Dewar PMO Treatment of Stabilization of some H-Bonded Systems.
  42. Krygowski T. M., Fawcett W. R., Can. J. Chem. 53, 3622, 1975. Separation of the Enthalpic and Entropic Contribution to Substituent Effect from the Ionization Equlibria Constant of Aromatic Acids.
  43. Fawcett W. R., Krygowski T. M., Can. J. Chem., 54, 3883, 1976. A Characteristic Vector Analysis of Solvent Effects for Thermodynamic Data.
  44. Fawcett R.W., Krygowski T. M., J. Electroanal. Chem., 77, 47, 1977. Separation of the Enthalpic and Entropic Contributions to Substituent Effects for the Electroreduction of Organic Molecules.
  45. Lipsztajn M., Krygowski T. M., Galus Z., J. Electroanal. Chem. 81, 347, 1977. Electrochemical Characteristics of Additional /red-ox/ Systems formed during the Electroreduction of Nitroso- Azoxy- and Azo-benzene.
  46. Krygowski T. M., Fawcett W. R., J. Chem. Soc. Perkin II, 2033 1977. The Analysis os Substituent Effects for Reactions not Following the Hammett Relation.
  47. Lipsztajn M., Krygowski T. M., Smolarz M., Szelagowska W., Pol. J. Chem., 52 , 1969, 1978. Substituent Effects in Electroreduction of Nitrobenzene in DMF.
  48. Krygowski T. M., Guilleme J., Wojtkowiak B., J. Chem. Soc. Perkin II. 1143, 1979. Limitation of the Hepler Theory of the Hammett Equation.
  49. Luanay G., Wojtkowiak B., Krygowski T. M., Can. J. Chem. 57, 3065, 1979. Substituent and Solvent Effects on Lewis Acidity of para-Substituted Anilines : Symmetry of Intractions.
  50. Krygowski T. M. Milczarek E., Wrona P. K., J. Chem. Soc. Perkin II, 1563, 1980. An Extension of the Kamlet-Tafft Basicity Scale of Solvent.
  51. Krygowski T. M., Radomski J. P., Rzeszowiak A., Wrona P. K., Reichardt Ch., Tetrahedron 37, 119, 1981. An Empirical Relationship between the Elvent Strengh Parameter E and Solvent Lewis Acidity and Basicity.
  52. Krygowski T. M., Więckowski T., Croat. Chim. Acta 54, 193, 1981. Analysis of the H-Bridge in Carboxylic Acids in Terms of Stabilization Energy Derived from Bond Lengths. Non-Hammett Properties of p-Substituted Benzoic Acids in the Crystalline State.
  53. Więckowski T., Krygowski T. M., Can. J. Chem., 59, 1622, 1981. Crystallographic Studies and Physicochemical properties of π-Electron Compounds. part I. Crystal and Molecular Structure of 6-N,N-diacetyloamino Chrysene /DAAC/.
  54. Taniewska - Osińska, S., Kamińska - Bartel L., Piekarski, H. and Krygowski, T. M., Can. J. Chem., 59, 817, 1981. Application of the Hancock steric constants to interpretation of heat of solution of benzamide in aliphatic alcohols.
  55. Khand M. A., Krygowski T. M., Bull. Acad. Polon. Sci., Ser. Sci Chim. 28, 783, 1980 [publie en mars (1982)]. The Ion-Pair Formation between Nitrobenzene Radical Anions and Na and (C H ) in Mixture of DMSO and Acetonitrile.
  56. Krygowski T. M., Guilleme J., J. Chem. Soc. Perkin II. 531, 1982. An Attempt at Interpretation of the Goulden Plot in Terms an Isokinetic Relationship.
  57. Geltz Z., Kokocińska R., Zalewski R., Krygowski T. M., J. Chem. Soc. Perkin Trans II. 1069, 1983. Thermodynamics of Benzoic Acid Protonation.
  58. Krygowski T. M., Reichardt Ch., Wrona P., Wyszomirska C., Zielkowska U., J. Chem. Res. (S), 116, 1983. Empirical Parameters of Lewis Basicity of Binary Solvent Mixtures. Mixtures with Methanol.
  59. Krygowski T. M., Anulewicz R., Kruszewski J., Acta Cryst. B39, 732, 1983. Crystallographic Stidies and Physicochemical Properties of π-Electron Compounds. Part III. Stabilization Energy and the Kekule Structure Contributions Derived from Experimental Bond Lengths.
  60. Krygowski T. M., J.Chem.Res.(S), 238, 1984. Crystallographic tudies and Physicochemical Properties of π-Electron Systems. Part V. Substituent Effect on the Geometry of the Benzene Ring in Benzene Derivatives.
  61. Krygowski T. M., Więckowski T., Sokołowska A., Croat. Chem. Acta. 57, 229, 1984. Infrared and Raman Studies of Carbonyl Group Frequencies of p-Substituted Benzoic Acids in the Crystalline State.
  62. Grabowski S. J., Krygowski T. M., Material Science, 9, 145, 1984. Analysis of the orientational disorder in crystals of carboxylic acids.
  63. Krygowski T. M., Anulewicz R., Material Science, 9, 85, 1984. Approximate estimation of the charge transfer in EDA-complexes in crystals : the case of 7,7,8,8-tetracyanoquinodimethane (TCNQ).
  64. Więckowski T., Krygowski T. M., Croat.Chem.Acta 58, 5, 1985. Crystallographic Studies and Physicochemical Properties of π-Electron Compounds. Part. II. Crystal and Molecular Structure of 2,4-Dinitrobenzoic Acid.
  65. Kalinowski M. K., Krygowski T. M., Croat. Chim. Acta 58, 107 1985. Application of the LFER in Organic Electrochemistry : Interpretation of the Hammett Reaction Constants (rho) for Processes of Reversible Electroreduction in Aprotic Solvent.
  66. Krygowski T. M., Wrona P. K., Zielkowska U., Reichardt Ch., Tetrahedron 41, 4519, 1985. Empirical Parameters of Lewis Acidity and Basicity for Aqueous Binary Solvent Mixtures.
  67. Grabowski S. J., Krygowski T. M., Acta Cryst. C41, 1224, 1985. Crystallographic Studies and Physicochemical Properties of π-Electron Compounds. Part. IV. Structure of 2,5-dinitrobenzoic acid.
  68. Milart P., Krygowski T. M., Can. J. Chem. 63, 3256, 1985. Analysis of Solvent and Substituent Effects on UV and Visible Spectra of N-/(-methylarylidene/-p-/N,N -dimethylamino - anilines.
  69. Karolak-Wojciechowska J., Anulewicz R., Krygowski T. M., Kryszewski M., Pęcherz J., Acta Cryst. C42, 172, 1986. Structure of p-Phenylenedi-methylenebis (dimethylsulfonium)-7,7, 8,8-Tetracyano-p-quinodimethanide (1/3).
  70. Krygowski T. M., Häfelinger G., Schüle J., Z. Naturforsch. 41b, 895, 1986. Interpretation of Substituent Angular Parameters of Monosubstituted Benzenes by Means of ab initio STO-3G Fully Optimized Molecular Structures and Charge Densities. Part VI of the Series Crystallographic Studies and Physicochemical Properties of π-Electron Systems.
  71. Krygowski T. M., Häfelinger, J.Chem.Res. (S), 348, 1986. Crystallographic Studies and Physicochemical Properties of p-Electron Systems. Part. 10. Ab initio STO-3G Interpretation of Hammett Substituent Constants.
  72. Maurin J. K., Krygowski T. M., Acta Cryst. C43, 64, 1987. Structure of N,N-Dimethyl-2,4-dinitro-3-toluidine. Part 12 of the Series : Crystallographic Studies and Physicochemical Properties of π-Electron Systems.
  73. Anulewicz R., Häfelinger G., Krygowski T. M., Regelman C., Ritter., Z.Naturforsch. 42b 917, 1987. Crystallographic Studies and Physicochemical properties of π-Electron Systems. Part VII. Refinement of the Crystal and Molecular Structure of p-N,N-Dimethylaminobenzoic Acid. Full ab initio STO-3G Optimization of its Molecular Geometry and Empirical Analysis of Substituent Effects on the Geometry of Benzene Rings in p-Substituted Benzoic Acid.
  74. Maurin J., Krygowski T. M., J. Mol. Struct. 158, 359, 1987. Crystallographic Studies and Physicochemical Properties of π-Electron Systems. Patr VIII. Crystal and molecular structure of N,N-dimethyl-4-nitro-2,6-xylidine. Application of the Walsh Rule to p-substituted Nitrobenzenes.
  75. Krygowski T. M., J.Chem.Res. 120, 1987. Crystallographic Studies and Physicochemical Properties of π-Electron Compounds. Part 13. Substituent Effect on the Geometry of the Ring in para Substituent Benzene Derivatives with Inter- and Intra-molecular Charge Transfer.
  76. Anulewicz R., Krygowski T. M., Pniewska B., J. Cryst. Spectr. Res. 661, 1987, Molecular structure od N,N-diphenylformamidine. Part 15 of the Series: Crystallographic Studies and Physicochemical Properties of π-Electron Systems.
  77. Maurin J., Krygowski T. M., Acta Cryst. C43, 2381, 1987. Crystallographic Studies and Phiysicochemical Systems. XVI. The Structure of N,N-Diethyl-3,4-dinitroaniline: Non-Additivity of Substituent Effect on the Geometry of the Benzene Ring.
  78. Krygowski T. M., Turowska-Tyrk I., Chem. Phys. Lett. 90, 1987. Deformation Directions Obtained from Atom-Atom Potentials Molecular Deformations in Crystals.
  79. 79. Firlej, L., Graja, A., Rajchel, A., Woźniak, K., Krygowski, T. M., Phys. Stat. Sol. (b) 140, 437, 1987, The 7,7,8,8-tetracyano-p-quinodimethanide Salt of the N-n-Propyl Quinoxalinum Cation - Its Structure, Conductivity, and Triplet spin Excitations.
  80. Maurin J., Krygowski T. M., J. Mol. Stuct. 172, 413, 1988. Crystallographic Studies amd Physicochemical Properties of π-Electron Systems. Part XIV. Crystal and Molecular Structure of N,N-dimethyl-p-nitroaniline.
  81. Turowska-Tyrk I., Krygowski T. M., Gdaniec M. Häfelinger G., Ritter G., J.Mol.Struct. 172, 401, 1988. Crystallographic Studies and Physico-chemical Properties of π-Electro Compounds. Crystal and Molecular Structure of Sodium p-nitrobenzoate Trihydrate.
  82. Grabowski, S.J., Krygowski, T.M., Chem. Phys. Lett. 151, 425 - 427, 1988, Atom - atom potential calculations on two mechanisms for proton transfer in carboxylic acid dimers.
  83. Krawiec M., Krygowski T. M. & Zakrzewski A., Acta Cryst., C45, 345, 1989. Structure of phenacyl phenyl sulfone.
  84. Grabowski S. J. & Krygowski T. M., Croatica Chemica Acta, 62, 485, 1989. Effect of the orientational on the observed geometry of carboxylic group in dimers of carboxylic acids in crystalline state.
  85. Krygowski T. M. & Maurin J., J.Chem.Soc. Perkin Trans II,) 695, 1989. Crystallographic studies off intra and inter-molecular interactions. Crystal and molecular structure of N,N-dimethyl-p-nitro-3,5-xylidine. Structural evidence against the classical through-resonance concept in p-nitroaniline and derivatives.
  86. Gdaniec M., Turowska-Tyrk I. & Krygowski T. M., J. Chem. Soc. Perkin Trans II.), 613, 1989. Crystal and molecular structure of pyrylium salts. Part 1. crystal and molecular structure of 2,6-diphenyl-4(2-phenylpropan-2-yl)pyrylium perchlorate and aromaticity of the pyrylium ring..
  87. Häfelinger G., Regelman C. U., Krygowski T. M. & Wozniak K., J. Comput. Chem. (.10, 329, 1989. Basis set Dependence, precision and Accuracy of full ab initio gradient optimization of molecular structures of nonstrained hydrocarbons. I.CC bond lengths.
  88. Krygowski T. M., Woźniak K., Bock Ch. W., George P., J. Chem. Res. (s), 396, 1989. Correlation of Hammmett Substituent constants with charge densities calculated using the 6-31G (5D) basis set.
  89. Woźniak K., Krygowski T. M., J. Mol. Struct., 193, 81, 1989. Crystallographic studies and physicochemical properties of π-electron systems. Part XVIII. Crystal and molecular structure of N-n-propyl-quinioxaline 7, 7', 8, 8'-tetracyano-p- quinodimethane: estimation of charge at TCNQ by the HOSE model.
  90. Wrona P. K., Krygowski T. M. and Zielkowska U., Z. Natuforsch. 44b, 673, 1989 , Empirical Parameters of Lewis Basicity of Binary Solvent Mixtures. Part II Mixtures with water..
  91. Krygowski T. M. & Turowska-Tyrk I., Collect. Czech. Chem. Commun. 55, 165, 1990. Crystal and molecular structure of potassium p-nitrophenolate monochydrate: substituent effect on geometry of the ring in p-substituted nitrobenzene derivatives.
  92. Krygowski T. M. & Turowska-Tyrk I., Pol. J. Chem. 64, 89, 1990. Crystallographic studies and physicochemical properties of π-electron compounds. Part XXII. Dependence of the reliability and predictive power of the Δ vs α. Plot for monosubstituted benzene derivatives on the quality of data sets.
  93. Krygowski T. M., Anulewicz R., Daniluk T., & Drapała T., Struct. chem. 1, 371, 1990, Crystallographic studies on sterically affected chemical species. Part 1. crystal and molecular structure of 2-carboxy-2'-methoxy-biphenyl. Definition of repulsive deformation parameters and angular consequences in geometry of systems with sterically interacting substituents.
  94. Grabowski S., Krygowski T. M., Häfelinger G., Ritter G., Acta Cryst, C46, 428, 1990. Crystallographic Studies and Physicochemical Properties of π-Electron Compounds. XVII. the structure of p-nitrophenylacetic acid.
  95. Wozniak K., Krygowski T. M., Kariuki B. & Jones W., Acta Cryst.C46, 1946, 1990, Structure of 2,3-dimethylquinoxaline.
  96. Woźniak K., Krygowski T. M., Kariuki B., Jones W., Grech E., J. Mol. Struct. 240, 119, 1990, Crystallographic studies of intra- and inter-molecular interactions. Part IV. Molecular and crystal structure of phthalazine semitetrafluoroborate: intramolecular changes in geometry as a conseqience of H-bonding.
  97. Woźniak K., Krygowski T. M., Kariuki B., Jones W., Grech E., J.Mol.Struc. 240, 111, 1990 Crystallographic Studies on Sterically Affected Chemical Species. Part II. Molecular and crystal structure of 1,8-bis (dimethylamino)-naphthalene tetrafluoroborate. Analysis of distorsion of geometry in the aromatic part due to intramolecular hydrogen bonding.
  98. Anulewicz R., Krygowski T.M., & Pniewska B., Acta Cryst. C46, 2121, 1990, Crystallographic Studies and Physicochemical Properties of π-Electron Systems. Part 21. Structure of N,N'-bis (p-chlorophenyl) formamidine.
  99. Krygowski T. M., Kalinowski M. K., Turowska-Tyrk I., Hiberty P. C. Milart P, Silvestro A., Topsom R. D., Daehne S., Struct.Chem. 2, 71, 1991. Crystallographic Studies of Intra and Intermolecular Interactions. Part 4. A Comparative Study of the Effect of Through- Resonance on the Geometry of p-Nitro and p-Nitrosophenolate Anions.
  100. Krygowski T. M., Anulewicz R., Pniewska B.,Milart P., J. Phys. Org. Chem. 4, 121, 1991. Crystal and Molecular Structure of Pyrylium Salts. IV. Crystal and Molecular Structure of 2,6-Diphenyl-4(4-carboxyphenyl)-Pyrylium Perchlorate. Interrelations between structural parameters due to substituent effects.
  101. Turowska-Tyrk I., Krygowski T. M., Milart P., Butt G., Topsom R.D., J. Mol. Struct. 245, 289 1991. Crystal and molecular structure of pyrylium salts. Part II. Crystal and molecular structure of 2,6-diphenyl-4 (4-nitrophenyl)-pyrylium perchlorate nitromethane solvate, electronegativity effect on geometry of the cation.
  102. Anulewicz R., Krygowski T. M., Raczynska E., Laurence Ch., J. Phys. Org. Chem. 4, 331, 1991. Crystallographic studies of inter- and intramolecular interactions. Part VI. Crystal and molecular structure of N,N'-dimethyl-N'- phenylsulphonylformamidine. Equalization of CN bond lengths in the amidine fragment as a result of substituent effects due to push-pull.
  103. Anulewicz R., Krygowski T. M., Jaroszewska-Manaj J., Pniewska B., Pol. J. Chem. 65, 465, 1991. Crystallographic studies and physicochemical properties of π-electron systems. Part XX. Crystal and molecular structure of N,'-di-(p-bromophenyl)- formamidine.
  104. Woźniak K,. Krygowski T. M., Kariuki B., Jones W., J. Mol. Struct. 248, 331, 1991. Crystallographic studies of intra- and intermolecular interactions. Part VII. Crystal and molecular structure of the complex of acridine-pentachloro phenol: H-bonding effect on the geometry of the pentachloropenol moiety.
  105. Woźniak K., Krygowski T. M., Filipek S., Acta Cryst. C47, 1326 1991. Structure of 6,7-Dimethyl-2,3-diphenlquinoxaline.
  106. Krawiec M. Krygowski T. M., J.Mol.Struct. 246, 113, 1991. Crystallographic stuies of intra- and intermolecular interactions. Part III. Refinement of the crystal and molecular structure of N,N-dimethyl-m-nitroaniline: additivity of substituent effects on geometrical paramaters of the ring.
  107. Krygowski T. M., Anulewicz R., Raczyńska E., Laurence Ch., J. Phys. Org. Chem. 4, 689 1991. Structural studies of 1,3-di(N,N-dimethyl-formamidyl)-2-cyanoguanidine. The case of a strongly Lewis Basic nitrogen atom in the cyano group. VIII. Crystallographic studies of intra- and intermolecular interactions.
  108. Wrona P. K., Krygowski T. M., Galus Z., J.Phys.Org.Chem. 4. 439 1991. Correlation between empirical Lewis acid-basesolvent parameters and the thermodynamic parameters of ion solvation. Part II. Acidity parameters of cations and basicity parameters of anions.
  109. Turowska - Tyrk, I., Krygowski, T.M., Milart, P., J. Mol. Struct. 263, 235, 1991. Crystal and molecular structure of pyrylium salts. Part III Crystal and molecular structure of 2,6-diphenyl -4 (4-N, N-dimethylaminophenyl)-pyrylium perchlorate: a case of a long distance substituent effect on geometry of the oyrylium ring.
  110. Oonishi I., Ohshima S.,Fujisawa S., Aoki J., Ohashi Y. Krygowski T. M., J.Mol.Struct. 265, 283, 1992. Conformation of condensed polycyclic aromatic hydrocarbons. Part III. The molecular an crystal structure of tribenzo [a,h,rst]phenanthra[1,2,10-cde]pentaphene: a simple analysis of the in-plane distorsions due to overcrowding.
  111. Krygowski T. M., J. Chim. Phys. 89, 1609, 1992. Crystallo- graphic studies of inter and intamolecular interactions affecting aromatic character of π-electron systems.
  112. Turowska-Tyrk I., Anulewicz R., Krygowski T. M., Pniewska B, Milart P., Pol. J. Chem. 66, 1831, 1992. Crystal and molecular structure of pyrylium salts. Part V. Crystal and molecular structure of 2,6-diphenyl4 (4-hydroxyphenyl)- and 2,6-diphenyl-4(4-methylphenyl)-pyrylium perchlorates.
  113. Häfelinger G., Krygowski T. M., Kuske F., Z. Naturforsch. 47b, 1480, 1992. Ab initio 3-21G calculations of push-pull interactins of substituents at imino-nitrogen in formamidines. Non-equivalence of NO-bonds of the nitro-substituents.
  114. Woźniak K., Krygowski T. M. Grech E., J.Mol.Struct. 274, 145, 1992. Disordered H-bonding in phthalazine 1-methyl-5-tetra- zolethione.
  115. Boese R., Blaser D., Nussbaummer M., Krygowski T. M., Struct. Chem. 3, 363, 1992. Low temperature crystal and molecular structure of nitrobenzene.
  116. Krygowski T. M., J. Inf. Comput. Sci., 33, 70, 1993. Crystallo- graphic studies of inter- and intramolecular interactions reflected in aromatic character of π-electron systems.
  117. Woźniak K., Krygowski T. M., Grech E., Kołodziejski W., Klinowski J., J. Phys. Chem.), 97, 1862, 1993. Hydrogen bonding and the structural substituted quinoxaline: solid-state NMR and single-crystal X-ray diffraction studies.
  118. Anulewicz R., Krygowski T. M., Gawinecki R., Rasała D., J. Phys. Org. Chem., 6, 257, 1993. Crystal and molecular structure of N-nitro-N-methyl-p-nitroaniline analysis of substituent effects on the ring geometry and estimation of the Hammett substituent constant for the N-methylnitramino group.
  119. Woźniak K., Krygowski T. M., Gawinecki R., Pol. J. Chem. 67, 1175, 1993.Crystal and molecular structure of N-(4'-dimethyl aminobenzylidene-amino)-3-nitropyridinium perchlorate. Aromaticity of phenylic and pyridinium rings studied by analysis of geometry.
  120. Woźniak K., Krygowski T. M., Pol. J. Chem. 67, 1667, 1993. Structural features of lithium-oxygen bond retrieved for ionic crystals from Cambridge Structural Database and Inorganic Structural data base".
  121. Kuhch N. D., Majchrzak I., Ciesielski W., Graja A., Woźniak K., Krygowski T. M., J. Phys. I France, 1987, 1993. New sulfur-fullerite; its preparation, structural and spectral properties.
  122. Woźniak K., Krygowski T. M., Grech E., Nowicka-Scheibe J., Pol. J. Chem. 68, 768, 1994. Desymmetrization of naphthalene moiety as a result of different substitution at peri positions.
  123. Dziembowska T., Szczodrowska B.,Krygowski T. M., Grabowski S. J., J. Phys. Org. Chem., 7, 142, 1994. Estimation of the OH...O interaction energy in intramolecular hydrogen bonds: a comparative study.
  124. Woźniak K., Krygowski T. M., Grech E., Pol. J. Chem., 68, 1813, 1994. Structural consequences of protonotion in substituted quinoxalines.
  125. Krygowski T. M., Anulewicz R., Pniewska B., Milart P., Bock Ch. W., Sawada M., Takai Y., Hanafusa T., J.Mol.Struct. 324, 251, 1994. Crystal and molecular structure of the lithium p-nitrosophenolate dihydrate dimer: an example of strong dependence of the (-electron cooperative substituent effect on the hydrogen-bonding network in the crystal lattice.
  126. Krygowski T. M., Ciesielski A., Świrska B., Leszczyński P., Pol. J. Chem., 68, 2097, 1994. Variation of Molecular Geometry and Aromatic Character of chrysene and perylene in their EDA complexes. refinement of X-ray crystal and molecular structure of chrysene and perylene.
  127. Krygowski T. M., Anulewicz R., Jarmula A., Bak T., Rasala D., Howard S. T., Tetrahedron, 46, 13155, 1994. The effect of the methoxy group on the geometry of the benzene ring supported by crystal structure studies and ab initio calculations. Crystal and molecular structure of 4-(4-methoxy phenyl)-2,6-diphenylpyridine and 1-methyl-4-(4-methoxy- phenyl) -2,6-diphenylpyridinium-perchlorate.
  128. Krygowski T. M., Anulewicz R., Milart P., Zimmermann T., J. Prakt. Chem., 336, 1994. Crystal and molecular structure of 2,6-diphenyl-4 -carboxypyrylium perchlorate and of 5,6,7,8-tetrahydro-8-oxo- 2,6-diphenyl -1-benzopyrylium perchlorate. A mutual correlation between structural parameters for symmetrically substituted pyrylium rings.
  129. Anulewicz R., Bąk T., Cyrański M., Krygowski T. M., Rasała D., Świrska B., Polish J. Chem., 69, 597, 1995. Substituent effect on pyridine and benzene rings in some 4-aryl-2,6-diphenylpiridines. Crystal and molecular structure of methyl - and fluoro derivatives.
  130. Krygowski T. M., Ciesielski A., J. Chem. Inf. Comput Sci., 35, 203, 1995. Aromatic character of benzene ring present in various topological environments in benzenoid hydrocarbons. Nonequivalence of indices of aromaticity.
  131. Krygowski T. M., Anulewicz R., Pniewska B., Bock C. W., Pol. J. Chem, 69, 723, 1995. Comparative study of substituent effect in para- and meta- nitrophenolate anions. Crystal and molecular structure of sodium m-nitrophenolate dihydrate and related ab initio calculations.
  132. Cyrański M., Krygowski T. M., Pol. J. Chem., 69, 1080, 1995. Structural studies of disubstituted benzene derivatives. Part I. Factor analysis study of the molecular geometry in para-disubstituted benzene derivatives.
  133. Cyranski M., Krygowski T. M., Pol. J. Chem., 69, 1088, 1995, Structural studies of disubstituted benzene derivatives. Part II. Factor and regression analyses of aromaticity of the ring in para-disubstituted benzene derivatives.
  134. Anulewicz R., Bąk T., Cyrański M., Krygowski T. M., Pawlak D., Pniewska B., Rasała D., Gawinecki R., Acta Chem. Scand., 49, 515, 1995. Substituent effect on the geometry of the pyridine ring in1-methyl-4-(-4-R-phenyl)-2,6-diphenylpyridinium perchlorates.
  135. Krygowski T. M., Anulewicz R., Wisiorowski M., Pol. J. Chem., 69, 1579, 1995. Derivation of the Kekul( contributions from experimental bond lengths for π-electron systems with NN nad NO nonds. Extension of the HOSE model.
  136. Irle S., Krygowski T. M., Niu J.E., Schwarz W.H.E., J. Org. Chem., 60, 6744, 1995. Substituent Effects of -NO and -NO2 Groups in Aromatic Systems.
  137. Krygowski T. M., Ciesielski A., Cyrański M., Chemical Papers, 49 128, 1995. Aromatic character and energy of the five- and seven- membered rings in derivatives of penta- and heptafulvene substituted in exocyclic position.
  138. Krygowski T. M., Ciesielski A., J. Chem. Inf. Comput Sci., 35, 1001, 1995. Local aromatic character of C60 and C70 and their derivatives.
  139. Krygowski T. M., Cyrański M., Tetrahedron, 52, 1713,1996. Separation of the energetic and geometric contributions to the aromaticity of -electron carbocyclics.
  140. Krygowski T. M., Ciesielski A., Cyrański M., J. Mol. Struct., 374, 277, 1996. Aromatic character of the cyclopentadienyl moiety embeded in various chemical envinronments: a statistical treatment of the structuraldata.
  141. Krygowski T. M., Cyrański M., Ciesielski A., Świrska B., Leszczyński P., J. Chem. Inf. Comput. Sci, 36, 1135,1996, Separation of the Energetic and Geometric Contributions to Aromaticity. 2. Analysis of the Aromatic Character of Benzene Rings in Their Various Topological Enviroment in the Benzenoid Hydrocarbons. Crystal and Molecular Structure of Coronene.
  142. Cyrański M., Krygowski T. M., J. Chem. Inf. Comput. Sci., 36, 1142, 1996. Separation of the Energetic and Geometric Contributions to Aromatici-ty. Part 3. Analysis of the Aromatic Character of Benzene Rings in Their Various Topological and Chemical Enviroments in the Substituted Benzene Derivatives.
  143. Krygowski T. M., Cyrański M., Wisiorowski M., Pol.J.Chem., 70, 1351, 1996. Through Space Substituent Effects Shedding Light on Aromaticity. Energetic and Geometric Contributions to Aromaticity.
  144. Krygowski T. M., Cyrański M., Tetrahedron, 52, 10255, 1996 Separation of the Energetic and geometric Contributions to the Aromaticity. Part .IV. A General Model for the π-Electron Systems.
  145. Krygowski T. M., Wisiorowski M., Nakata K., Fujio M., Tsuno Y., Bull. Chem. Soc. Jpn., 69, 2275, 1996. Changes of the Aromatic Character of the Ring in Exocyclically Substituted Derivatives of Benzylic Cation as a Result of Varying Charge at the exo-Carbon Atom.
  146. Howard S. T., Krygowski T. M., Glówka M. L., Tetrahedron, 52, 11379, 1996.The Imbalanced Kekule Structure Contributions in the Ring in 1,3,5-trisubstituted Benzene Derivatives: Low Temperature X-Ray Study on 1,3,5-trimethoxybenzene, and ab initio Calculations on 1,3,5-triformylo-benzene and trimethoxy-benzene and the Related Di-substituted Systems.
  147. Krygowski T. M., Pawlak D., Anulewicz R., Rasala D., Gawinecki R., Hafelinger G., Homsi M. N., Kuske F. K. H., Acta Chem.Scand., 50, 808, 1996. Resonance Interactions in the N-Nitramino Group. X-Ray Study of α-, β- and γ-Nitraminopyridines.
  148. Cyrański M., Krygowski T. M., Tetrahedron, .52, 13795, 1996. Separation of the energetic and Geometric Contributions to the Aromaticity of π-Electron Carbocyclics.Part.V. Analysis of the Aromatic Character of Aza-Analogues of benzenoid Hydrocarbons.
  149. Krygowski T. M., Anulewicz R., Hiberty P. C., J. Org. Chem., 61, 8533, 1996. Structural Consequences of the Substituent Nonsymmetry on the Geometry of the benzene Ring. Analysis of the Molecular Geometry of Diazo-Derivatives of Benzene.
  150. Albert K., Hafelinger G., Milart P., Krygowski T. M., Kuhn T., Pusch M., Strohschein S., Z.Naturforsch. 52b, 263, 1997. Conformational Aspects of the p-Nitrosophenolate Anion and Related Compounds: NMR Study and ab initio 6-31G Optimizations of Molecular structures.
  151. Krygowski T. M., Howard S. T., Martynowski D., Główka M. L., J.
    Phys.Org.Chem., 10, 125, 1997. Imbalance of the Kekule Structures in 2,4,6-Trimetoxy-S-Triazine.
  152. Krygowski T. M., Cyrański M., Nakata K., Fujio M., Tsuno Y., Tetrahedron, 53, 11383, 1997. Separation of the Energetic and Geometric Contribitions to Aromaticity. Part VI. Changes of the Aromatic Character of the Rings in Naphthalene, Antracene, Phenanthrene and Pyrene Derivatives Induced by the Charged Substituent CH2+..
  153. Krygowski T. M., Wisiorowski M., Howard S. T., Stolarczyk L. Z., Tetrahedron 53, 13027, 1997. Angular-Group-Induced Bond Alternation. I. Origin of the Effect from Ab-Initio Calculations.
  154. Krygowski T. M., Chem. Listy, 91, 616, 1997. Angular Group Induced Bond Alternation (AGIBA) - A New Type of the Substituent Effect.
  155. Howard S. T. and Krygowski T. M., Can. J. Chem., 75, 1174, 1997. Benzenoid Hydrocarbon Aromaticity in Terms of Charge Density Descriptors.
  156. Woźniak K., Krygowski T. M., Pawlak D., Kołodziejski W. and Grech E., J. Phys. Org. Chem., 10, 814, 1997.Solid State NMR and X-Ray Diffraction Studies of Ionic Complex of 1,8-bis (dimethylamino) naphthalene (DMAN) with Picrolic Acid.
  157. Anulewicz R., Wawer I., Krygowski T. M., Mannele F. and Limbach H.-H., J. Am. Chem. Soc. 119, 12223, 1997. Combined X-ray diffraction and 15N CPMAS NMR study of molecular structure and proton order/disorder phenomena in cyclic N,N'-bisaryloformamidine dimers.
  158. Krygowski T. M., Woźniak K., Anulewicz R., Pawlak D., Kołodziejski W., Grech E. and Szady A., J. Phys. Chem., 101, 9399, 1997. Through-Resonance Assisted Ionic Hydrogen Bonding in 5-Nitro-N-salicydeneethylamine.
  159. Cyranski M. K., Krygowski T. M., Wisiorowski M.,.van Eikema Hommes N. J. R and Schleyer P. v. R., Angew. Chem. Int. Ed., 37 , 177, 1998. Global and Local Aromaticity in Porphyrines: An Analysis Based on Molecular Geometries and Nucleus-Independent Chemical Shifts.
  160. Cyranski M. K., Krygowski T. M., Wisiorowski M., Eikema Hommes N. J. R.van and Schleyer P. v. R., Angew. Chem. 110, 187, 1998. Globale und lokale Aromatizitat in Porphyrinrn: eine Analyse anhand von Molekulgeometrien und kerneunabhangigen chemischen Verschiebungen.
  161. Howard S. T., Krygowski T. M., Ciesielski A. and Wisiorowski M., Tetrahedron, 54, 3533, 1998. Angular Group Induced Bond Alternation II The Magnitude and the Nature of the Effect and its Application to Polynuclear Benzenoid Systems.
  162. Anulewicz R., Krygowski T. M. and Jagodziński T., Pol. J. Chem., 72, 439, 1998. The Crystal and Molecular Structure of Cyclic Thioamide β-Diketone Derivatives. Intramolecular H-Bonding and the Problem of Quasiaromaticity.
  163. Krygowski T. M., Cyrański M., Nakata K., Fujio M., Tsuno Y., Tetrahedron. 54, 3303, 1998. Separation of the Energetic and Geometric Contribitions to Aromaticity.Part VII. Changes of the Aromatic Character of the Rings in Naphthalene Induced by the Charged Substituent CH2+. The Dependence on the Position of the Substituent, Torsion Angle and the Exocyclic Bond Length Variation.
  164. Jarmuła A., Anulewicz R., Leś A., Cyrański M. K., Adamowicz L., Bretner M., Felczak K., Kulikowski T., Krygowski T. M. and. Rode W., Biochim. Biophys. Acta, 1382, 277, 1998. Crystal Structure of 5-fluoro-dUrd and its 2 and/or 4-thio analogues: models of substituted dUMP pyrimidine ring interacting with thymildylate synthase.
  165. Cyranski M.K., Krygowski T. M. and Bird C.V., Tetrahedron, 54, 9711, 1998. Separation of the Energetic and Geometric Contribitions to Aromaticity, Part VIII Changes in Aromaticity and the Evidence for the Multidimensionality of of the Aromatic Character of Benzene ring in Para- and Meta-Cyclophanes.
  166. Jarmuła A., Cyrański M. K., Leś A., Krygowski T. M., Rode W., Pol. J. Chem., 72, 1958, 1998. Interaction of Thymidylate Synthase with 5-Fluoro- Substituted DUMP Analogues in View of the Pyrimidine Ring Structure.
  167. Krygowski T. M., Anulewicz R., Cyrański M. K., Puchała A. and Rasała D., Tetrahedron, 54, 12295, 1998. Separation of the Energetic and Geometric Contribitions to Aromaticity. Part IX. Aromaticity of Pyrazoles in Dependence on the Kind of Substitution.
  168. Krygowski T. M., Piętka E., Anulewicz R., Cyrański M. K. and Nowacki J., Tetrahedron, 54, 12289, 1998. Angular Group Induced Bond Alternation. Part III. The Case of o-Dimethoxy Derivatives. Crystal and Molecular Structure of 3,4-dimethoxybenzaldehyde(4-metylphenyl)sulphonyl]hydrazone.
  169. Katritzky A. R., Karelson M., Sild S., Krygowski T. M. and Jug K., J. Org. Chem., 63, 5228, 1998. Aromaticity as a Quantitative Concept: Part 7 Aromaticity Reaffirmed as a Multidimensional Characteristic.
  170. Krygowski T. M., Grabowski S. J., Konarski J., Tetrahedron, 54, 11311, 1998,. Water Molecules as a Gluing Factor in Organic Crystals and Biological Systems.
  171. Cyranski, M.K. and Krygowski, T.M., Tetrahedron, , 54, 14 919, 1998. Separation of the Energetic and Geometric Contribitions to Aromaticity. Part X. The Case of Benzene Rings in Fused Polycyclic Benzenoid Hydrocarbons.
  172. Madura I. D., Krygowski, T. M. and Cyranski M. K., Tetrahedron, 54, 14 913, 1998. Structural Aspects of the Aromaticity of Cyclic pi-electron systems with BN Bonds.
  173. 172. Grabowski, S. J. and Krygowski, T. M., Tetrahedron, 54, 5683 - 5694, 1998, Estimation of the Proton Position and the Energy of O-H�O Bridges in Crystals from X-Ray Diffraction Data.
  174. Micuch, P., Fisera, L., Cyranski M.K. and Krygowski, T.M., Tetrahedron Letters, 167, 1999. Reversal of Stereoselectivity of Mg(II) Catalysed 1,3-Dipolar Cycloaddition. Acceleration of Cycloaddition by Microwave Irradiation.
  175. Krygowski, T.M., Stępień, B., Anulewicz, - Ostrowska, R., Dziembowska, T., Tetrahedron, , 55, 5457, 1999. π - Electron Delocalisation in the Spacer of the )-H...N Bridge in Schiff Bases. Crystal and Molecular Structure of 3,5-dimethoxy-2[(phenylimino)methyl]methyl]phenol and 4-methoxy[(phenylimino) methyl]phenol.
  176. Cyranski, M.K. and Krygowski, T.M., Tetrahedron, 55, 6205, 1999. Two Sources of the Decrease of Aromaticity: Bond Length Alternantion and Bond Elongation. Part 1. An Analysis Based on Benzene Ring Deformations
  177. Cyranski, M.K. and Krygowski, T.M., Tetrahedron, 55,11 143, 1999. Two Sources of the Decrease of Aromaticity: Bond Length Alternantion and Bond Elongation. Part 2. An Analysis Based on Geometry of the Singlet and Triplet States of 4nπ Annulenes.
  178. Grabowski, S.J. and Krygowski, T.M., Chem. Phys. Lett., 305, 247, 1999. The Proton transfer path for C=O...H-O Systems Modelled from Crystal Data.
  179. Anulewicz - Ostrowska R., Piętka, E., Krygowski, T.M., Micuch, P. and Fisera L., Pol. J. Chem., 40, 167, 1999. Crystal and Molecular Structure of 3-(2,4,6-trimethyl)8-phenyl-oxo-1,7-dioxa-2-azaspiro[4,4]non-2-ene.
  180. Anulewicz - Ostrowska R., Krygowski, T.M., Cyranski, M.K., Matuszewska M.P., Pol. J. Chem., 73, 1895, 1999. Crystal and Molecular Structure of 1,3,5-trimethoxy-2,4,6-trinitrobenzene. Mesomeric Effects for Out-of-plane Twisted Substituents.
  181. Krygowski, T.M., Stępień, B., Anulewicz - Ostrowska, R., Cyrański, M.K., Grabowski, S.J., Rozwadowski, Z. And Dziembowska, T., Coll. Czech. Chem. Commun, 64, 1797, 1999. Crystal and Molecular Structure of N-(3,5-dichloro-2-hydroxybenzylidene) - and N-(2-hydroxy-3-methoxybenzylidene)aniline oxides. Delocalization in the spacer of the intramolecular H-bond and the problem of quasiaromaticity.
  182. Slezak, R., Krutosikova, A., Cyranski, M.K., Krygowski, T.M. Pol. J. Chem., 74, 207, 2000. Furo[2,3-b]pyrrole Derivatives. Syntheses and Reactions in the Furan and Pyrrole Ring.
  183. Krygowski, T.M., Pindelska, E., Cyrański, M.K., Grabowski, S.J., Tetrahedron, 56, 8715, 2000. Angular Group Induced Bond Alternation (AGIBA) Part 4. Does the Effect Operate in the Systems with Alternated Bonds?
  184. Grabowski, S.J., Krygowski, T.M., Stępień, B., Reaction pathway of proton transfer from the neautral to zwitterionic forms of amino acids. Support for a water molecule-mediated mechanism. J. Phys. Org. Chem., 13, 740, 2000.
  185. Kolehmainen, E., Ośmiałowski, B., Krygowski, T.M., Kauppinen, R., Nissinen, M., Gawinecki, R., J.Chem. Soc. Perkin 2, 2000, 1259. Substituent and temperature controlled tautomerism: multinuclear magnetic resonance, X-ray,and theoretical studies on 2-phenacylquinolines,
  186. Micuch, P. and Fisera L., Cyrański, M. K., Krygowski, T.M., Krajcik, J., Tetrahedron, 56, 5465, 2000. Reversal of diastereoselectivity of nitrile oxide 1,3-dipolarcycloaddition by Mg(II). Acceleration of cycloaddition by microwave irradiation.
  187. Cyrański, M.K., Stepien, B., Krygowski, T.M., Tetrahedron, 56, 5465, 2000. Global and local aromaticity of linear and angular polyacenes.
  188. Krygowski T. M., Pindelska E., Anulewicz - Ostrowska R., Grabowski S. J., Dubis A. T., J. Phys. Org. Chem., 14, 349, 2001. Angular Group-induced bond alternation (AGIBA), Part 5. Conformational dependence and additivity of the effect: structural studies of 3,5-dimethoxybenzaldehyde derivatives and related systems.
  189. Stępień, B. T., Cyrański, M. K., Krygowski, T. M., Chem. Phys. Lett. 350, 537, 2001. Aromaticity strongly affected by substituents in fulvene and heptafulvene as a new method of estimating the resonance effect.
  190. Temeriusz A., Anulewicz R., Wawer I., Krygowski T. M., Piekarska - Bartoszewicz B., Rowinska M., Carbohydrate Res., 334, 71- 79, 2001. Crystal structure and solid state 13C NMR analysis of N-(methyl 3,4,6-tri-O-acetyl- , and -D-glucopiranosid-2-yl)oxamide derivative of p-chloroaniline, N,N-diethyl-amine, N-methylaniline and N-ethylaniline.
  191. Witkowski S., Anulewicz - Ostrowska R., Krygowski T. M., Pol. J. Chem., 75, 883, 2001. Water molecules as a gluing factor in organic crystals. Part 2. The crystal and molecular structure of 6-acetoxy-2,5,7,8-tetramethylchroman-2-carbocyclic acid monohydrate.
  192. Krygowski T. M., Cyrański M. K., Anulewicz - Ostrowska R., Pol. J. Chem., 75, 000, 2001. Guanidinium cation - an acyclic analogue of benzene?
  193. Pindelska E., Krygowski T. M., Anulewicz - Ostrowska R., Cyrański M.K., Nowacki J., J. Phys. Org. Chem., 14, 764, 2001. Angular Group-Induced Bond Alternation (AGIBA), Part 6, Competition between the AGIBA and Through Resonance Effects.
  194. Krygowski T. M., Lambert J. B., J. Phys. Org. Chem., 14, 727, 2001. Editorial to the special issue dedicated to Dr John Shorter on the occasion of his 75th, birthday.
  195. Cyrański M. K., Krygowski T. M., Krutosikova A., Slezak R., Tetrahedron, 57, 8867, 2001. Aromaticity of Dihetero Analogues of Pentalene Dianion. X-ray and ab-initio Studies of Eight Methyl Furo[3,2-b]pyrrole-5-carboxylate Derivatives and Five Methyl Furo[2,3-b]pyrrole-5-carboxylate Derivatives.
  196. Krygowski T. M., Pindelska E., Pol. J. Chem., 76, 325, 2002. Angular Group-Induced Bond Alternation (AGIBA), Part VII. The Case of a Branched substituent - the carboxylic group.
  197. Krygowski T. M., Grabowski S. J., Anulewicz - Ostrowska R., Izdebski J., Fiertek D., Pol. J. Chem., 76, 129, 2002. An empirical estimation of the interactions H+...Cl-. The crystal and molecular structure of the 1-methyl-2-tertbutyloamino-4-isopropyl-5(4H)-imidazolone hydrochloride.
  198. Cyrański, M. K., Krygowski, T. M., Katritzky A. R., Schleyer, P. v. R., J. Org. Chem., 67, 1333, 2002.To What Extent Can Aromaticity Be Defined Uniquely?
  199. Ośmiałowski, B., Kolehmainen, E., Nissinen, M., Krygowski, T. M., Gawinecki, R., J. Org. Chem., 67, 3339, 2002.(1Z,3Z)-1,4-Di(pyridin-2-yl)buta-1,3-diene-2,3-diol: The Planar Highly Conjugated Symmetrical Enediol with Multiple Intramolecular Hydrogen Bonds.
  200. Krygowski, T. M., Pindelska, E., Cyrański, M. K., Haefelinger, G., Chem. Phys. Lett. 359, 158 - 62, 2002, Planarization of 1,3,5,7-cyclooctatetraene as a result of a partial rehybridization at carbon atoms: an MP2/6-31G* and B3LYP/6-311G** study.
  201. Krygowski, T. M., Pindelska, E., Anulewicz - Ostrowska, R., Nowacki, J., Pol. J. Chem., 2002, 76, 1249 -54. Angular Group-Induced Bond Alternation (AGIBA), Part VIII Crystal and Molecular Structure of 2,3,6,7-tetrahydro-1H,5H-pirydo[3,2,1-ij]quinoline-9-carbaldehyde(E,E)-azine. A Competition Between the AGIBA and the Through Resonance Effects.
  202. Stępień, B. T., Krygowski, T. M. and Cyrański, M. K., J. Org. Chem., 67, 5987 - 5992, 2002.How Far Can Cyclic -Electron Delocalization Be Modified in Exocyclically Substituted Fulvenes?
  203. Krygowski T. M., Pindelska E., Cyrański M. K., Nowacki J., Int. Electr. J. Mol. Des., 1, 593 - 602, 2002, "Angular Group Induced Bond Alternation (AGIBA) Part IX. Interactions with the Pirimidine Ring".
  204. Bodwell G. J. , Bridson J. N., Cyrański M. K., Kennedy J. W. J., Krygowski T. M., Mannion M. R., Miller D. O., Nonplanar Aromatic Compounds. 8. Synthesis, Crystal Structures and Aromaticity Investigations of the 1,n-Dioxa[n] (2,7) pyrenophanes. How does Bending Affect the "Cyclic pi-electron Delocalization of the Pyrene System?" J. Org. Chem, 68, 2089 - 2098, 2003.
  205. Stępień, B. T., Krygowski, T. M., Cyrański, M. K., J. Phys. Org. Chem. 16, 426 - 430, 2003, "Variation of the -Electron Delocalisation in Exocyclically Substituted Heptafulvene Derivatives"
  206. Jaworski, J.S., Krygowski T.M., Pol. J.Chem., 77. 221 - 225, 2003, Free Energy Contribution to the Specific Solvatation of Anions. A Comparison of "Pure" Acidity Solvent Scales.
  207. Cyrański, M. K., Schleyer, P. v. R., Krygowski, T. M., Jiao, H., Hohlneicher, G., Tetrahedron, 59, 1657 - 65, 2003. Facts and artifacts about aromatic stability estimation.
  208. Cyrański, M.K., Gilski, M., Jaskólski, M., Krygowski, T. M., J. Org. Chem., 68, 8607 - 8613, 2003, On the Aromatic Character of the Heterocyclic Bases of DNA and RNA.
  209. Krygowski, T.M., Cyrański, M.K., Phys.Chem. Chem. Phys. 2004, 6, 249 - 55, , Two faces of the structural aspects of aromaticity.
  210. Krygowski, T.M., Grabowski, S.J., Chem. Phys. Letters, 2004, 389, 51 - 57,. Where the two carbon atoms touch in the triple bond in disubstituted acetylenes: the AIM analysis.
  211. Stępień, B.T., Krygowski, T. M., Cyrański, M. K., Młochowski, J., Orioli, P.-L., Abbate, F., ARKIVOC, 2004, 185 - 201. How far is the p electron delocalisation of the phenenthrene moiety modfied in the aza-analogues and their N-oxides.
  212. Krygowski, T.M., Cyrański, M. K., Sung, D. D., Stępień, B. T., J. Phys. Org. Chem., 2004, 17, 699 - 706. Solvolysis of aromatic benzoyl chlorides: how is p - electron stabilisation of the aromatic acyl chlorides and acylium cations related to p-electron delocalization?
  213. Szatyłowicz, H., Krygowski, T.M., Pol. J. Chem., 2004, 78, 1719 1731. Molecular Geometry as a Source of Chemical Information. Part I How H-Bonding Modifies Molecular Structure in the Vicinity of Hydrogen Donating Group. The Case of Phenol Derivatives Interacting with Nitrogen and Oxygen Bases
  214. Krygowski, T.M., Ejsmont, K., Stepien, M. K., Poater, J., Sola M., J. Org. Chem., 2004, 69, 6634 - 40. On the relation between the substituent effect and aromaticity.
  215. Krygowski, T. M., Zachara, J. E., Sztyłowicz H., J. Org. Chem., 2004, 69, 7038 - 43. Molecular Geometry as a Source of Chemical Information. Part III. How H - bonding Affects Aromaticity of the Ring in the case of Phenol and Para-nitrophenol Complexes - a B3LYP/6-311+G** Study.
  216. Krygowski, T. M., Szatyłowicz H., Zachara, J.E., J. Chem. Inf. Comput. Sci., 2004, 44, 2077 - 82. Molecular Geometry as a Source of Chemical Information. Part IV. How the H-bonding affects aromaticity of the ring in variousely substituted phenol complexes with bases.
  217. Krygowski, T. M., Stępień, B. T., Pol. J. Chem., 2004, 68, 2213 - 17. Changes in Aromaticity in the Ring of Monosubstituted Benzene Derivatives.
  218. Grabowski, S.J.; Walczak, M.; Krygowski, T.M., Chem. Phys. Lett., 2004, 400, 362 - 67, The substituent effect in ethylenes and acetylenes - AIM analysis
  219. Krygowski, T. M., Zachara, J.E., Szatyłowicz H., J. Phys. Org. Chem., 2005, 18, 110 - 114, Molecular Geometry as a Source of Chemical Information. Part II An Attempt to estimate the H-bond strength - the case of p-nitrophenol complexes with bases.
  220. Krygowski, T. M., Zachara, J.E., Theor. Chem. Acc. 2005, 114, 229 - 234. How -p-electron delocalisation reflects replacement of H+ with Li+ in variously substituted malonaldehydes
  221. Krygowski, T. M., Stępień, B. T., Cyrański, M. K., Int. J. Mol. Sci. 2005, 6, 45. How the Substituent Effect Influences p - electron Delocalisation in the ring of Reactants in the Reaction Defining the Hammett Substituent Constants sm and sp..
  222. Krygowski, T. M., Szatyłowicz, H. and Zachara J. E., J. Chem. Inf. Mod. 2005, 45, 652. Molecular Geometry as a Source of Chemical Information. Part V. Substituent effect on the position of proton transfer in para-substituted phenol complexes with flouride - a B3LYP/6-311+G** Study.
  223. Krygowski, T. M., Int. J. Mol. Sci. 2005, 6, 1. Guest Editorial:Special Issue dedicated to Professor Marvin Charton - Correlation Analyst Par Excellence.
  224. Raczyńska, E.D., Krygowski, T.M., Zachara, J.E., Oœmiałowski B., Gawinecki R., J. Phys. Org. Chem., 2005, 18, 892. Tautomeric equilibria, H-bonding and pi-electron delocalization on o-nitrosophenol. A B3LYP/6-311+G(2df,2p)study.
  225. Krygowski, T. M., J. Phys. Org. Chem., 2005, 18, 683, Editorial,.
  226. Desystnyk, O., Pszczółkowski, L., Thorwirth, S., Krygowski, T. M., Kisiel, Z., Phys.Chem.Chem.Phys., 2005, 7, 1708. The Rotational Spectra, Electric Dipole Moments and Molecular Structures of Anisole and Benzaldehyde.
  227. Krygowski, T.M.; Zachara J.E. Moszyński, R., J. Chem. Inf. Mod. 2005, 45, 1837, Theoretical Study of Changes in pi-Electron Delocalization in the analogues of ortho-Hydroxy Schiff Base when Proton is replaced by Li+ and BeH+.
  228. Krygowski, T. M.; Szatyłowicz, H.; Zachara, J.E. J. Org. Chem., 2005, 70, 8859 - 65. How H-Bonding Modifies Molecular Structure and pi-Electron Delocalization in the ring of Pyridine/Pyridinium Derivatives involved in H-bond Complexation.
  229. Krygowski, T. M., Stepien, B.T., Cyranski, M.K., Ejsmont, K., J. Phys. Org. Chem., 2005, 18, 886 - 91.Relation between resonance energy and substituent resonance effect in p-phenols.
  230. Oœmiałowski B.; Raczyńska E.D.; Krygowski T.M. J. Org. Chem. 2006, 71, 3727 - 36. Tautomeric Equilibria and pi-electron Delocalization for some Monohydroxyarenes - Quantum Chemical Studies.
  231. Krygowski, T. M.; Szatyłowicz H. J. Phys. Chem. A. 2006, 116, 7232 -36. Varying Electronegativity of OH/O- Groups Depending on the Nature and Strength of H-bonding in Phenol/Phenolate involved in H-bond Complexation
  232. Ciesielski, A.; Cyrański, M. K., Krygowski, T. M., Fowler, P. W.; Lillington, M., J. Org. Chem., 2006, 116, 6840 - 45, Super-Delocalized Valence Isomer of Coronene,
  233. Krygowski, T. M.; Zachara J. E., Oœmiałowski, B.; Gawinecki, R., J. Org. Chem., 2006, 116, 7678 - 82, Topology Driven Physicochemical Properties of pi-electron Systems. Part 1. Does the Clar Rule Work in Cyclic pi-electron Systems with Intramolecular Hydrogen or Lithium Bonds?
  234. Szatyłowicz, H. Krygowski, T. M., J. Phys. Chem. A 2006, 110. 7232 - 36, Varying Electronegativity of OH/O- Groups Depending on the Nature and Strength of H-Bonding In Phenol/Phenolate Involved In H-Bond Complexation.
  235. Krygowski, T. M. Dobrowolski, M.A., Zborowski, K., Cyranski, M.K. , J. Phys. Org. Chem. 2006, 19, 889 - 895. Relation between the substituent effect and aromaticity. Part II. The case of meta- and para-homodisubstituted benzene derivatives.
  236. Szatyłowicz, H. Krygowski, T. M., Hobza P. J. Phys. Chem. A 2007, 111, 170 - 175, How the Shape of the NH2 Group Depends on the Substituent Effect and H-Bond Formation In Derivatives of Aniline.
  237. Cyranski M.K., Havenith, W.A., Dobrowolski, M.A., Gray, B.R., Krygowski, T.M., Fowler, P.W., Janneskens, L.W., Chem. Eur. J., 2007, 13, 2201 - 07, The phenalenyl motif: a magnetic chameleon.
  238. Krygowski, T.M., Palusiak, M., Plonka, A., Zachara - Horeglad, J.E., J. Phys. Org. Chem., 2007, 20, Relationship begtween substituent effect and aromaticity - Part III: naphthalene as a transmitting moiety for substituent effect.