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Comparison of the room and low temperature (203 K) 13C NMR spectra of 3‐cis‐bicyclo[4.4.0]decanone and its 2,2,4,4‐tetradeuterio isotopomer provides information about the deuterium isotope effect on the conformational equilibrium in this compound. Four‐bond low field deuterium isotope effects on some carbon chemical shifts are observed. These effects can be used for unambiguous assignment of the 13C lines to carbon atoms in alicyclic compounds.
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Pehk et al. (1982) studied this question.
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