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Carbon-13 chemical shifts and 1J(CH) coupling constants in 3,5 - dehydrodiamantane

✍ Scribed by Milan Hájek; Jan Třiska; Sergej D. Isajev; Luděk Vodička

Publisher: John Wiley and Sons
Year: 1982
Tongue: English
Weight: 263 KB
Volume: 20
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270200102

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✦ Synopsis

Abstract

^13^C NMR spectra of 3,5‐dehydrodiamantane were compared with those of diamantanoid compounds with and without a cyclopropane ring. The effect of the cyclopropane ring in 3,5‐dehydrodiamantane is similar to that for the carbon atoms of 2,4‐dehydroadamantane and 2,4‐methano‐2,4‐dehydroadamantane, but not for 1,3‐dehydroadamantane. One‐bond coupling constants [^1^J(CH)] are discussed in terms of ring size and compared with bond angles. The observed difference between ^1^J(CH) of CH and CH~2~ groups of diamantanoid skeletons is connected with a change of the number of equatorial or axial positions of CH bonds in the cyclohexane ring.

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