There are series of C,H, formulae for fully benzenoid hydrocarbons which correspond to equal numbers of all-benzenoid isomers. These formulae are treated in general terms. Also, other classes of all-benzenoids are defined in relation to a periodic table for fully benzenoid hydrocarbons. Some new enu
Series of benzenoid hydrocarbons with a constant number of isomers
β Scribed by Sven J. Cyvin; Jon Brunvoll
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 283 KB
- Volume
- 176
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
There are series of C&H, formulas for benzenoid hydrocarbons which correspond to equal numbers of isomers. General expressions (in two schemes) are reported for these formulas. The numbers of isomers for these constant-isomer series are treated by a combination of mathematical analysis and computer-generated data. New numbers of isomers are reported.
π SIMILAR VOLUMES
In fig. 1 and on page 14, right-colomn, 17th line from below, D5" should be D5,,. The symmetry distributions in table 2 for series beginning with C6,HL9 and CssH,, should be C,(4), C,(37), instead ofC,(5), C,(36). 6 December I99 I \*\*\*
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