References
1. Wizinger-Aust R, Gillis JB, Helferich B, Wurster C (1966) Kekulé und seine Benzolformel.
Verlag Chemie, Weinheim
2. Bugge G (1979) Das Buch der Grossen Chemiker II. Verlag Chemie, Weinheim, pp 200–216
3. Hückel E (1931) Quantentheoretische Beiträge zum Benzolproblem I. Die Elektronenkonfiguration des Benzols und verwandter Verbindungen. Z Phys 70:204–286
4. Hückel E (1940) Grundzüge der Theorie ungesättigter und aromatischer Verbindungen.
Verlag Chemie, Berlin
5. Pauling L, Wheland GW (1933) The nature of the chemical bond. V. The quantum–
mechanical calculation of the resonance energy of benzene and naphtalene and the
hydrocarbon free radicals. J Chem Phys 1:362–374
6. Pauling L, Sherman J (1933) The nature of the chemical bond. VI. The calculation from
thermochemical data of the energy of resonance of molecules among several electronic
structures. J Chem Phys 1:606–617
7. Pauling L (1945) The nature of the chemical bond. Cornell Univ. Press, Ithaca
8. Gallup GA (2002) A short history of valence bond theory. In: Cooper DL (ed) Valence bond
theory. Elsevier, Amsterdam, pp 1–37
9. Wheland GW (1955) Resonance in organic chemistry. Wiley, New York
11. Klein DJ (1983) Valence bond theory for conjugated hydrocarbons. Pure Appl Chem
55:299–306
11. Klein DJ, Seitz WA (1988) Pauling-Wheland resonance theory of benzenoid hydrocarbons.
J Mol Struct (Theochem) 169:167–181
12. Klein DJ (1990) Semiempirical valence bond views for benzenoid hydrocarbons. Topics
Curr Chem 153:57–83
13. Pauling L, Brockway LO, Beach JY (1935) The dependence of interatomic distance on single
bond—double bond resonance. J Am Chem Soc 57:2705–2709
14. Longuet-Higgins HC (1950) Resonance structures and MO in unsaturated hydrocarbons.
J Chem Phys 18:265–274
15. Dewar MSJ, Longuet-Higgins HC (1952) The correspondence between the resonance and
molecular orbital theories. Proc Roy Soc Lond A214:482–493
16. Ham NS (1958) Mobile bond orders in the resonance and molecular orbital theories. J Chem
Phys 29:1229–1231
17. Ham NS, Ruedenberg K (1958) Mobile bond orders in conjugated systems. J Chem Phys
29:1215–1223
18. Heilbronner E (1962) Über einen graphentheoretischen Zusammenhang zwischen dem
Hückel’schen MO–Verfahren und dem Formalisum der Resonanztheorie. Helv Chim Acta
50:1722–1725
19. Herndon WC (1973) Enumeration of resonance structures. Tetrahedron 29:3–12
20. Cvetković D, Gutman I, Trinajstić N (1974) Graph theory and molecular orbitals. VII. The
role of resonance structures. J Chem Phys 61:2700–2706
21. Kiang YS (1980) Determinant of adjacency matrix and Kekulé structures. Int J Quantum
Chem Quantum Chem Symp 14:541–547
22. Wilcox CF (1968) Stability of molecules containing (4n)-rings. Tetrahedron Lett 9:795–800
23. Wilcox CF (1969) Stability of molecules containing nonalternant rings. J Am Chem Soc
91:2732–2736
24. Gutman I, Trinajstić N (1975) On the parity of Kekulé structures. Croat Chem Acta 47:35–39
25. Gutman I, Randić M, Trinajstić N (1978) Kekulé structures and topology. III. On
inseparability of Kekulé structures. Rev Roum Chim 23:383–395
26. Cvetković D, Gutman I, Trinajstić N (1972) Kekulé structures and topology. Chem Phys Lett
16:614–616
27. Graovac A, Gutman I, Trinajstić N (1977) Topological approach to the chemistry of
conjugated molecules. Springer, Berlin
11 Paradise Lost—π-Electron Conjugation in Homologs …
315
1. Wizinger-Aust R, Gillis JB, Helferich B, Wurster C (1966) Kekulé und seine Benzolformel.
Verlag Chemie, Weinheim
2. Bugge G (1979) Das Buch der Grossen Chemiker II. Verlag Chemie, Weinheim, pp 200–216
3. Hückel E (1931) Quantentheoretische Beiträge zum Benzolproblem I. Die Elektronenkonfiguration des Benzols und verwandter Verbindungen. Z Phys 70:204–286
4. Hückel E (1940) Grundzüge der Theorie ungesättigter und aromatischer Verbindungen.
Verlag Chemie, Berlin
5. Pauling L, Wheland GW (1933) The nature of the chemical bond. V. The quantum–
mechanical calculation of the resonance energy of benzene and naphtalene and the
hydrocarbon free radicals. J Chem Phys 1:362–374
6. Pauling L, Sherman J (1933) The nature of the chemical bond. VI. The calculation from
thermochemical data of the energy of resonance of molecules among several electronic
structures. J Chem Phys 1:606–617
7. Pauling L (1945) The nature of the chemical bond. Cornell Univ. Press, Ithaca
8. Gallup GA (2002) A short history of valence bond theory. In: Cooper DL (ed) Valence bond
theory. Elsevier, Amsterdam, pp 1–37
9. Wheland GW (1955) Resonance in organic chemistry. Wiley, New York
11. Klein DJ (1983) Valence bond theory for conjugated hydrocarbons. Pure Appl Chem
55:299–306
11. Klein DJ, Seitz WA (1988) Pauling-Wheland resonance theory of benzenoid hydrocarbons.
J Mol Struct (Theochem) 169:167–181
12. Klein DJ (1990) Semiempirical valence bond views for benzenoid hydrocarbons. Topics
Curr Chem 153:57–83
13. Pauling L, Brockway LO, Beach JY (1935) The dependence of interatomic distance on single
bond—double bond resonance. J Am Chem Soc 57:2705–2709
14. Longuet-Higgins HC (1950) Resonance structures and MO in unsaturated hydrocarbons.
J Chem Phys 18:265–274
15. Dewar MSJ, Longuet-Higgins HC (1952) The correspondence between the resonance and
molecular orbital theories. Proc Roy Soc Lond A214:482–493
16. Ham NS (1958) Mobile bond orders in the resonance and molecular orbital theories. J Chem
Phys 29:1229–1231
17. Ham NS, Ruedenberg K (1958) Mobile bond orders in conjugated systems. J Chem Phys
29:1215–1223
18. Heilbronner E (1962) Über einen graphentheoretischen Zusammenhang zwischen dem
Hückel’schen MO–Verfahren und dem Formalisum der Resonanztheorie. Helv Chim Acta
50:1722–1725
19. Herndon WC (1973) Enumeration of resonance structures. Tetrahedron 29:3–12
20. Cvetković D, Gutman I, Trinajstić N (1974) Graph theory and molecular orbitals. VII. The
role of resonance structures. J Chem Phys 61:2700–2706
21. Kiang YS (1980) Determinant of adjacency matrix and Kekulé structures. Int J Quantum
Chem Quantum Chem Symp 14:541–547
22. Wilcox CF (1968) Stability of molecules containing (4n)-rings. Tetrahedron Lett 9:795–800
23. Wilcox CF (1969) Stability of molecules containing nonalternant rings. J Am Chem Soc
91:2732–2736
24. Gutman I, Trinajstić N (1975) On the parity of Kekulé structures. Croat Chem Acta 47:35–39
25. Gutman I, Randić M, Trinajstić N (1978) Kekulé structures and topology. III. On
inseparability of Kekulé structures. Rev Roum Chim 23:383–395
26. Cvetković D, Gutman I, Trinajstić N (1972) Kekulé structures and topology. Chem Phys Lett
16:614–616
27. Graovac A, Gutman I, Trinajstić N (1977) Topological approach to the chemistry of
conjugated molecules. Springer, Berlin
11 Paradise Lost—π-Electron Conjugation in Homologs …
315