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13 C 13 C spin–spin coupling constants and 13 C isotope effects on 13 C chemical shifts in some 4‐membered rings
Author(s) -
Jokisaari Jukka
Publication year - 1978
Publication title -
organic magnetic resonance
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0030-4921
DOI - 10.1002/mrc.1270110313
Subject(s) - chemical shift , coupling constant , chemistry , carbon 13 , molecule , kinetic isotope effect , spin (aerodynamics) , isotope , oxetane , crystallography , organic chemistry , atomic physics , physics , nuclear physics , particle physics , deuterium , thermodynamics
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.