著者

相原 惇一

出版者

The Japan Society of Calorimetry and Thermal Analysis

雑誌

熱測定 (ISSN:03862615)

巻号頁・発行日

vol.12, no.2, pp.61-72, 1985-04-05 (Released:2009-09-07)

参考文献数

30

被引用文献数

7

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Since Kekulé's discovery of the benzene structure, chemists have been seeking a generally acceptable definition of aromatic stabilization. Their efforts resulted in a variety of ideas and indexes concerning aromatic chemistry. Most of them, however, failed even to attribute aromaticity to cyclic π-electron conjugation. Some indexes have shared the name “resonance energy”. Dewar defined in 1965 what is called Dewar-type resopance energy. It was epoch-making, in that an aromatic compound was characterized reasonably by its positive value. The absence of double-bond reactivity in an aromatic compound was then associated with an extra thermodynamic stability inherent in such a cyclic π-electron system. We devised a graph theory of aromaticity in 1975, and succeeded in explaining many physicochemical aspects of an aromatic compound within a single theoretical framework. This theory enabled us to evaluate Dewar-type resonance energy with no fitting of parameters.