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Forcing bonds of a benzenoid system
Acta Mathematicae Applicatae Sinica, 1996zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, Fuji, Li, Xueliang
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The Tutte polynomials of catacondensed benzenoid systems
Journal of Mathematical Chemistry, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Haizhen Ren, Deqing Xu, Weiling Yang
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Clar Polynomials of Large Benzenoid Systems
Journal of Chemical Information and Computer Sciences, 1998We discuss the constructions of Clar-like valence structures and the associated Clar polynomials for large benzenoids. We have shown that Clar polynomial satisfy a theorem analogous to the Clarke's theorem for the characteristic polynomial of graphs, which allows one to reconstruct the polynomial of a system from the polynomials associated with ...
Randić, Milan +3 more
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Normal components of benzenoid systems
Theoretica Chimica Acta, 1993Consider a benzenoid system with fixed bonds and the subgraph obtained by deleting fixed double bonds together with their end vertices and fixed single bonds without their end vertices. It has often been observed for particular benzenoid systems, and conjectured (or stated) that, in general, such a subgraph has at least two components, and that each ...
Pierre Hansen, Maolin Zheng
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Almost-isospectral benzenoid systems
Chemical Physics Letters, 1991Abstract The concept of almost-isospectral molecular graphs is defined and its importance for the experimental testing of Huckel molecular-orbital theory is pointed out. Examples of almost isospectral benzenoid systems are reported.
Ivan Gutman, Svetlana Marković
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Molecular Structural Descriptors of Donut Benzenoid Systems
Polycyclic Aromatic Compounds, 2021Circumcised donut benzenoid systems are a class of polycyclic aromatic hydrocarbons (PAHs) derived from planar benzenoid networks by strategically eliminating a few hexagons.
Julietraja K. +4 more
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Polycyclische benzenoide Systeme
Monatshefte f�r Chemie Chemical Monthly, 1988Superposition of significant electron structures is used to estimate the mesomerism stabilization of polycyclic benzenoid systems by consideration of the number ofKekule structures and of benzenoid interactions between them. General formulae and stability rules are given for many classes of cata and pericondensed molecules.
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Benzenoid Systems: Basic Concepts
1988The main topic of the present book is the enumeration of Kekule structures in benzenoid hydrocarbons. Since enumeration is essentially a mathematical procedure, it is beneficial to seek for an appropriate mathematical representation of benzenoid hydrocarbons as well as of Kekule structures.
S. J. Cyvin, I. Gutman
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Topological properties of benzenoid systems
Theoretica Chimica Acta, 1977The sextet polynomial of non-branched cata-condensed benzenoid molecules is proved to be related (Eq. (3)) to the characteristic polynomial of a tree.
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Fully benzenoid systems revisited
Journal of Molecular Structure: THEOCHEM, 1991Abstract Fully benzenoid hydrocarbons are benzenoid hydrocarbons in which benzene rings of a polycyclic benzenoid system are either assigned to isolated π sextets or are shown as “empty”. For a number of polycyclic benzenoid hydrocarbons we examined Kekule valence structures in order to characterize those that contribute to Clar's valence formulae ...
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