Results 81 to 90 of about 489,454 (164)

QSPR correlations of half-wave reduction potentials of cata-condensed benzenoid hydrocarbons

open access: yesARKIVOC, 2006
Jyoti Singh   +5 more
doaj   +1 more source

On the Energy of Benzenoid Hydrocarbons

Polycyclic Aromatic Compounds, 2021
In chemistry, the energy of a graph is of interest since it can be used to approximate the total π-electron energy of molecules.
A. Jahanbani   +2 more
openaire   +2 more sources

Szeged Indices of Benzenoid Hydrocarbons

Polycyclic Aromatic Compounds, 1996
Abstract The Szeged index (Sz) is a recently proposed structure descriptor based on distances between vertices of the molecular graph. Numerous properties of Sz were previously shown to parallel that of the long-known Wiener index (W). We report explicit combinatorial expressions for Sz of a variety of homologous series of benzenoid hydrocarbons ...
I. Gutmana   +4 more
exaly   +2 more sources

Aromaticity of Nonplanar Fully Benzenoid Hydrocarbons

The Journal of Physical Chemistry A, 2017
The Clar aromatic sextet theory can provide a qualitative description of the dominant modes of cyclic π-electron conjugation in benzenoid molecules and of the relative stability among a series of isomeric benzenoid systems. In a series of nonplanar fully benzenoid hydrocarbons, the predictions of the Clar theory were tested by means of several ...
Marija Antić   +2 more
openaire   +4 more sources

Benzenoid rings resonance energies and local aromaticity of benzenoid hydrocarbons

Journal of Computational Chemistry, 2018
In this article, we consider partitioning of the analytical expression for resonance energy (RE) in smaller benzenoid hydrocarbons, to individual benzenoid rings of polycyclic molecules. The analytical expression for molecular RE, available since 1976, is given by the count of all linearly independent conjugated circuit in all Kekulé structures in a ...
M. Randic
openaire   +2 more sources

On the Number of Benzenoid Hydrocarbons

Journal of Chemical Information and Computer Sciences, 2002
We present a new algorithm which allows a radical increase in the computer enumeration of benzenoids b(h) with h hexagons. We obtain b(h) up to h = 35. We prove that b(h) approximately const.kappa(h), prove the rigorous bounds 4.789 < or = kappa < or = 5.905, and estimate that kappa = 5.16193016(8).
Markus Vöge   +2 more
openaire   +2 more sources

Embedding in Benzenoid Hydrocarbons

Journal of Chemical Information and Computer Sciences, 1996
Using the embedding scheme and a rule we proposed previously, in this work we discuss common eigenvalues and their degeneracies in benzenoid molecular graphs.
Jun Liu, Yuansheng Jiang
openaire   +2 more sources

Predictive potential of spectrum‐based topological descriptors for measuring the π‐electronic energy of benzenoid hydrocarbons with applications to boron triangular and boron α‐nanotubes

Mathematical methods in the applied sciences, 2021
In this paper, we determine the efficiency of all commonly occurring eigenvalues‐based topological descriptors for measuring the π‐electronic energy of lower polycyclic aromatic hydrocarbons.
M. Y. H. Malik   +3 more
semanticscholar   +1 more source

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