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Carbon chemical shifts of 1,1-diphenylethylene and α-methylstyrene dimer dianions

✍ Scribed by Kensuke Takahashi; Kaoru Yamada; Kazuyoshi Wakata; Ryuzo Asami

Publisher
John Wiley and Sons
Year
1974
Tongue
English
Weight
140 KB
Volume
6
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The natural abundance C‐13 NMR spectra of 1,1‐diphenylethylene and α‐methylstyrene dimer dianions have been obtained using the proton noise decoupling technique. The extra negative charge distributions in the carbanions have been discussed and compared with those obtained from the proton chemical shifts. The chemical shifts of the two ortho carbons in a phenyl ring are equivalent to each other for the former carbanion but not for the latter.

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