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Die konjugative Wechselwirkung zwischen π- und Walsh-Orbitalen: Das Photoelektron-Spektrum des Homofulvens

✍ Scribed by R. Gleiter; E. Heilbronner; A. de Meijere

Book ID: 102858519
Publisher: John Wiley and Sons
Year: 1971
Tongue: German
Weight: 514 KB
Volume: 54
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19710540409

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✦ Synopsis

Abstract

Analysis of the photoelectron spectrum of homofulvene (1) (spiro [2.4] hepta‐4,6‐diene) confirms the conclusions previously drawn concerning the direct conjugation between π‐and Walsh‐orbitals. It is shown that the resonance integral (4) appropriate for the semi‐quantitative interaction of these orbitals amounts to −1.9 eV, i.e. nearly the value for conjugating π‐orbitals (β = −2.4 to −2.5 eV). This explains the close analogy between the photoelectron spectrum of 1 and that of fulvene.

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## Abstract The qualitative analysis of the PE.‐spectrum of 7‐cyclopropylidene‐norbornadiene (**3**) shows that the ‘through‐space’ interaction of the **e**~A~‐__Walsh__ orbital with the antisymmetric linear combination \documentclass{article}\pagestyle{empty}\begin{document}$ {{\pi \_ - = (\pi \_a