The 1H and 19F spectra of 1,1,2,2-tetrafluoroethane are completely analysed as an A4X2 system, both in the pure liquid and in a number of solvents, to obtain all the 1H and 19F chemical shifts and couplings. The solvent dependence of the coupling constants enables the couplings in the individual rotamers to be evaluated.
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Cavalli et al. (1970) studied this question.
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