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# LIMITATIONS OF THE NMR METHOD TO STUDIES OF ROTATIONAL ISOMERISM.

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/15197

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 Title: LIMITATIONS OF THE NMR METHOD TO STUDIES OF ROTATIONAL ISOMERISM. Creators: Govil, G.; Bernstein, H. J. Issue Date: 1967 Abstract: NMR and thermodynamic parameters for the two rotational isomers of $CHBr_{2}-CFBr_{2}$ have been obtained from their low temperature $^{1} H$ and $^{19} F$ spectra. The results are in variance with those obtained from the conventional method which utilises the temperature dependence of the time-averaged spectra at higher temperature. Limitations of the second method will be discussed. An analysis of the lineshapes has been made and the barrier to internal rotation has been obtained. The signs of the coupling constants in the two rotamers have been established. URI: http://hdl.handle.net/1811/15197 Other Identifiers: 1967-D-1