M. Tordeux et al., USE OF THE CL-35 CL-37 ISOTOPIC EFFECT ON NUCLEAR SHIELDING AS A TOOLFOR F-19-NMR SPECTROSCOPIC ANALYSIS/, New journal of chemistry, 19(3), 1995, pp. 287-292
F-19-NMR analysis based on the chlorine isotopic effect allows the det
ermination of the number of chlorine atoms geminal to a fluorine atom
in polyhalogenated compounds. Extension of this method to the analysis
of products substituted by bromine and fluorine atoms is also possibl
e, but the isotopic effect is weaker.