STRUCTURAL DETERMINATION OF FLUOROORGANIC MIXTURES BY F-19 COSY NMR-SPECTROSCOPY

A method for the structural determination of mixtures of perfluorinate d compounds without material separation was investigated using a simpl e F-19 COSY NMR technique. Two COSY experiments with different evoluti on period were used to elucidate complicated coupling constants. Each peak of a molecule was identified in a mixture using a long evolution period and then the peaks of each molecule were assigned using a stand ard evolution time. The structures of three isomers of chlorotrifluoro ethylene trimers were elucidated using the proposed method.