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Conformational analysis XX—13C NMR studies of saturated heterocycles 5—substituent effects on the 13C chemical shifts of methyl substituted 1,3-dithiolanes

✍ Scribed by Kalevi Pihlaja; Mauri Eskonmaa; Raimo Keskinen; Alpo Nikkilä; Timo Nurmi

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
309 KB
Volume
17
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C NMR chemical shifts for 1,3‐dithiolane and 13 methyl substituted derivatives are reported. Substituent effects are derived and compared with those for cyclopentanes and 1,3‐dioxolanes. The magnitude and variety of the substituent effects are best explained with the aid of a half‐chair conformation where the S‐1C‐2S‐3 plane passes between C‐4 and C‐5.

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