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13C13C spin–spin coupling constants and 13C isotope effects on 13C chemical shifts in some 4-membered rings

✍ Scribed by Jukka Jokisaari

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
272 KB
Volume
11
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C^13^C spin–spin coupling constants in natural abundance oxetane, thietane, cyclobutanone, bromo‐and chlorocyclobutane have been measured. Furthermore, the ^13^C isotope‐induced changes in the chemical shifts of the different ^13^C nuclei in the molecules mentioned above are reported. These shifts are normally to higher magnetic field; in cyclobutanone, however, the resonance of the carbonyl carbon has shifted to lower field because of the substitution of ^13^C−3 for ^12^C−3.

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