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Conformational analysis: IX–a 300 MHz study of 4-vinylbutyrolactone

✍ Scribed by Kalevi Pihlaja; Frank G. Riddell; Jorma Jalonen; Pirkko Rinta-Panttila; Marc Anteunis

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

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✦ Synopsis

Abstract

The 300 MHz ^1^H NMR spectrum of 4‐vinylbutyrolactone has been recorded and analysed. The results showed that the compound is a mixture of two rapidly interconverting envelope forms in which (C‐3) is the flap atom. The vinyl group favours the pseudo‐equatorial orientation by 1·9 ± 0.3 kJ mol^−1^, as shown by the dependence of the vicinal coupling constants on temperature.

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