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Photoelectron and ultraviolet absorption spectra of cyclopropyl conjugated 1,2-diketones

โœ Scribed by J. Kelder; H. Cerfontain; B.R. Higginson; D.R. Lloyd

Publisher
Elsevier Science
Year
1974
Tongue
French
Weight
232 KB
Volume
15
Category
Article
ISSN
0040-4039

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โœฆ Synopsis

To get more insight into the valence shell structure of cyclopropyl conjugated 1,2-diketones, 2 we have studied both the He I photoelectron spectra and the ultraviolet absorption spectra of dicyclopropylethanedione (I) and l-cyclopropyl-1,2-propanedione (II). The He I photoelectron spectra (fig.11 were recorded on a Perkin Elmer PS 18, and the UV-spectra on a Cary 14 (fig.3). The synthesis of cyclopropyl conjugated 1,2-diketones has been described by Guillaud, et al. 3 and Kelder, fi _1.

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โœ J. Kelder; H. Cerfontain ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 212 KB

We have studied the behaviour of three cyclopropyl conjugated 1,2-diketones (I a, b, and c) ' in isopropanol upon irradiation with a Philips SP 500 W mercury lamp (with 436 nm as the most intense line). For comparison we extended this study to three non-cyclopropyl containing 1,2-diketones, viz. bia