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The Electronic Structure of Phenylene and Naphthylene Bicyclobutanes. Photoelectron spectroscopy and model calculations

✍ Scribed by Rolf Gleiter; Klaus Gubernator; Mirjana Eckert-Maksić; Jens Spanget-Larsen; Bernard Bianco; Gérard Gandillon; Ulrich Burger

Publisher
John Wiley and Sons
Year
1981
Tongue
German
Weight
463 KB
Volume
64
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The photoelectron (PE.) spectra of 1,2,3‐methenoindane (2), 1,2,3‐metheno‐2,3‐dihydro‐1__H__‐cyclopenta [b]naphthalene (3) and 1,2,3‐metheno‐2,3‐dihydro‐1__H__‐phenalene (4) are investigated. The PE. spectrum of 1,3‐methano‐2,3‐dihydrophenalene (7) is reported and compared with that of 4. The experimental results are analyzed in terms of empirical correlation diagrams and the results of semiempirical MINDO/3 and CNDO/S calculations. The analysis indicates that the strong impact of the bicyclobutylene group on the spectroscopic properties of the aromatic π‐systems in 2, 3 and 4 is due to hyperconjugative interactions involving bicyclobutane Walsh orbitals.

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