Author： Emsley J.W.
Publisher： Taylor & Francis Ltd
ISSN： 1362-3028
Source： Molecular Physics, Vol.9, Iss.4, 1965-01, pp. : 381-394
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Abstract
The 19 F high resolution N.M.R. spectra of the four compounds C 6 F 11 Cl, C 6 F 11 Br, C 6 F 10 Cl 2 and C 6 F 10 Br 2 have been recorded under identical conditions, and the chemical shifts obtained compared with those of the axial and equatorial nuclei in perfluorocyclohexane. It is shown that the magnitude of the chemical shift of 19 F nuclei more than two bonds removed from the chlorine or bromine atoms can be accounted for satisfactorily in terms of intramolecular electric fields, provided that the structure of the molecules is that of an asymmetrically distorted chair form.
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