Preparation of the all-syn isomer of 1,2,3,4-tetrafluorocyclohexane is reported; X-ray structural studies shows a conformation with two of the C-F bonds oriented 1,3-diaxial to each other and (19)F-NMR reveals a through space diaxial (4)J(FF) coupling constant of 29 Hz.
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Durie et al. (2011) studied this question.
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