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A rotational barrier about the isopropyl to aryl bond in highly substituted sulphines

✍ Scribed by Albert Tangerman; Binne Zwanenburg

Publisher
John Wiley and Sons
Year
1977
Tongue
English
Weight
332 KB
Volume
9
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The rotational barriers in sulphines containing the substituents 2,6‐dimethyl‐3‐isopropyl‐4‐methoxyphenyl and 4,6‐dimethyl‐3‐isopropyl‐2‐methoxyphenyl are discussed. Particular attention is given to the occurrence of a barrier to rotation about the isopropyl to aryl bond. In both types of sulphines the isopropyl group is flanked by a methyl and a methoxy group. The isopropyl to aryl barrier could only be detected in the sulphines containing the second type of substituent where the o‐methoxy group experiences a buttressing effect from the CSO moiety.

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