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An NMR study of cis-2-butene partially oriented in a nematic phase

✍ Scribed by E. E. Burnell; P. Diehl

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
256 KB
Volume
5
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The NMR spectrum of cis‐2‐butene partially oriented in a nematic phase has been analysed, and information about the geometry and the indirect spin‐spin coupling constants has been obtained. Assuming the barrier of rotation of the methyl groups and other geometrical information from microwave studies, we obtained = 126 ± 2° and = 116.8 ± 0·6°. The angle that the CH~3~ rotation axis makes with the double bond was calculated to be 127·5 ± 0.4°; this value is closely linked with the assumed value of = 109°28′.

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