Titlebook: Advances in the Theory of Benzenoid Hydrocarbons; Ivan Gutman,Sven J. Cyvin Conference proceedings 1990 Springer-Verlag Berlin Heidelberg

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Benzenoid hydrocarbons in space: The evidence and implications,all other known polyatomic, interstellar molecules, they possess great potential as important probes of conditions in many different kinds of astronomical objects. Conversely, astronomical observations are extending our knowledge of these exotic materials by probing regions in which some conditions

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,The distortive tendencies of delocalized π electronic systems. Benzene, cyclobutadiene and related the strength of the 2e-π bond, as predicted by the Valence Bond model. Thus, the π system is forced by the σ framework to adopt a regular geometry rather than an alternated one of Kekulé type. The quantum mechanical resonance energy (QMRE), stabilization directly due to the mixing of Kekulé structu

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https://doi.org/10.1057/9780230358911all other known polyatomic, interstellar molecules, they possess great potential as important probes of conditions in many different kinds of astronomical objects. Conversely, astronomical observations are extending our knowledge of these exotic materials by probing regions in which some conditions

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Benzenoid hydrocarbons in space: The evidence and implications,xcited benzenoid hydrocarbons referred to as polycyclic aromatic hydrocarbons (PAHs). The most intense emitters contain between 20 to 50 carbon atoms, although larger species also contribute to the emission. This assignment is based on a rough resemblance of the interstellar emission spectra to the