A high-resolution N.M.R. study of 3,3,3-trifluoropropyne in different liquid crystals is reported. The relative geometry obtained agrees with microwave data. The sign of J (HF) is negative. The anisotropies in fluorine and proton chemical shifts have been measured, and are comparable in magnitude and sign with values previously reported for similar compounds.
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Buckingham et al. (1968) studied this question.
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