Results 21 to 30 of about 489,454 (164)
The Hall rule in fluoranthene-type benzenoid hydrocarbons [PDF]
Journal of the Serbian Chemical Society, 2008 The applicability of the Hall rule (linear relation between the total π-electron energy and the number of Kekulé structures) was investigated in the case of fluoranthene-type benzenoid hydrocarbons. It was found that the originnal Hall rule is not obeyed,
Đurđević Jelena +2 more
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On the oxidation of dibenzo[fg,ij]pentaphene and dinaphtho[2,1,8,7-defg:2',1',8',7'-ijkl]pentaphene dianions [PDF]
Journal of the Serbian Chemical Society, 1999 The dianion of dibenzo[fg,ij]pentaphene has recently been synthesized and shown to react with oxygen, forming the 15,16-dioxo derivative in nearly quantitative yield. Oxidation of the dianion of dinaphtho[2,1,8,7-defg:2',1',8',7'-ijkl]pentaphene
Gutman Ivan
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On Computation and Analysis of Topological Index-Based Invariants for Complex Coronoid Systems
Complexity, 2021 In chemical graph theory, benzenoid systems are interrogated as they exhibit the chemical compounds known as benzenoid hydrocarbons. Benzenoid schemes are circumscribed as planar connected finite graphs having no cut vertices wherein the entire internal ...
Muhammad Aamer Rashid +3 more
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Topological properties of altan-benzenoid hydrocarbons [PDF]
Journal of the Serbian Chemical Society, 2014 The main topological characteristics of altan-benzenoids are established. In particular, it is shown that the perimeter of Kekuléan altan-benzenoids is of size 4k , having a destablizing (antiaromatic) energy effect, similar to (4k)-annulenes.
Gutman Ivan
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Electron content of rings of fully benzenoid hydrocarbons [PDF]
Journal of the Serbian Chemical Society, 2005 The distribution of -electrons in rings of fully benzenoid hydrocarbons was investigated. It was found that the electron content EC of "full" rings varies significantly (between 5.5 and 2.5 electrons), and depends on the annelation mode, mainly on the ...
Gutman Ivan +3 more
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Scientific Reports, 2023 The novel applications in chemistry include the mathematical models of molecular structure of the compounds which has numerous findings in this area that refers to mathematical chemistry.
M. Shanmukha +6 more
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Stability order of isomeric benzenoid hydrocarbons and Kekulé structure count [PDF]
Journal of the Serbian Chemical Society, 2009 The commonly accepted opinion that the thermodynamic stability of isomeric benzenoid hydrocarbons (assessed by their total π-electron energy and various resonance energies) increases with increasing number of Kekulé structures is shown to be violated in ...
SLAVKO RADENKOVIĆ, IVAN GUTMAN
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Connectivity indices and QSPR analysis of benzenoid hydrocarbons
Open Journal of Discrete Applied Mathematics, 2023 In mathematical chemistry, a large number of topological indices are used to predict the physicochemical properties of compounds, especially in the study of quantitative structure-proerty relationship (QSPR). However, many topological indices have almost
Zhen Lin
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New bounds and approximations for total π-electron energy: A critical test [PDF]
Kragujevac Journal of Science, 2014 The quality and correlating ability of some recently deduced bounds and approximate formulas for total π-electron energy are tested on a sample of 106 Kekuléan benzenoid hydrocarbons.
Gutman Ivan +2 more
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Symmetry, 2022 In this paper, we introduce some new versions based on the locating vectors named locating indices. In particular, Hyper locating indices, Randić locating index, and Sambor locating index.
S. Wazzan, A. Saleh
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