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Showing papers by "Andrey A. Dobrynin published in 1996"

Journal Article•
On the szeged index of unbranched catacondensed benzenoid molecules

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Andrey A. Dobrynin1, lvan Gutman•
Russian Academy of Sciences1
01 Nov 1996-Croatica Chemica Acta

7 citations

Journal Article•DOI•
Theory of helicenic hydrocarbons. Part 5: Irreducible helicenes and their enumeration

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Zhang Fuji1, J. Brunvoll2, S. J. Cyvin2, Bjørg N. Cyvin2, Guo Xiaofeng3, Andrey A. Dobrynin4 •
Xiamen University1, Norwegian University of Science and Technology2, Xinjiang University3, Russian Academy of Sciences4
01 Aug 1996-Structural Chemistry
TL;DR: In this article, the generation of irreducible helicenes from primitive coronoids is treated, and algebraic expressions are deduced for their numbers with the aid of computer programming.
Abstract: An irreducible helicene is a helicene from which no hexagon can be deleted if it shall remain to be a helicene. The generation of irreducible helicenes from primitive coronoids is treated, and algebraic expressions are deduced for their numbers. Symmetry plays an important role in this treatment. Numerical results obtained with the aid of computer programming are reported.

2 citations