It is known that an alternative algorithm to the Gordon-Davidson algorithm for counting the Kekule valence structures of catacondensed non-branched benzenoid hydrocarbons is a reformulation of the original algorithm. Recently an alternative algorithm [ 1,2] to the Gordon-Davison (GD) algorithm [ 31
The number of Kekulé, structures in long benzenoid chains
✍ Scribed by Ivan Gutman; Sven J. Cyvin
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 345 KB
- Volume
- 147
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
Explicit formulas are given for the number of Kekul6 structures of some classes of corona-condensed benzenoids. A general algorithm for cycloarenes is reported.
The linear dependence, previously claimed, of the total -rr-electron energy (E~) of isomeric benzenoid hydrocarbons on the number of Kekul6 structures (K) is found to be a satisfactory approximation only for benzenoids having eight or fewer six-membered rings (h ~< 8), and is violated if h >1 9. For
The number of Kekult structures for primitive coronoids is studied. The systems have obvious counterparts within a class of hydrocarbons known as cycloarenes. Complete solutions are given for centrosymmetrical primitive coronoids and those with trigonal or hexagonal symmetries. The technique is base