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Quadricyclanes. Part I: Photoelectron spectra and electronic structure

✍ Scribed by Hans-Dieter Martin; Constanze Heller; Edwin Haselbach; Zuzana Lanyjova

Publisher
John Wiley and Sons
Year
1974
Tongue
German
Weight
345 KB
Volume
57
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The photoelectron spectra of quadricyclane (3) and 3‐methylidene quadricyclane (4) have been measured. The results served as a basis for the elucidation of the electronic structure of these compounds, which agreed with theoretical calculations. It is found that the symmetry of the HOMO of 3 is different when compared to that of its valence isomer norbornadiene (1). The results also indicate that the structure of the highest occupied orbitals cannot be derived by only considering the Walsh‐orbitals of the two three‐membered rings. In addition one of the Walsh‐components of the four‐memebered ring has to be taken into account.

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Quadricyclanes. Part II: Electronic stru
Quadricyclanes. Part II: Electronic structure and chemical reactivity
✍ Edwin Haselbach; Hans-Dieter Martin 📂 Article 📅 1974 🏛 John Wiley and Sons 🌐 German ⚖ 495 KB 👁 1 views

## Abstract The electronic structure of quadricyclane and 3‐methylidenequadricyclane obtained by photoelectron spectroscopy, is used as a basis for the discussion of cycloadditions to these systems. The electronic structure of 3‐heteroquadricyclanes, arrived at by theoretical calculations, agrees w