Nuclear magnetic resonance spectroscopy. Carbon-13 chemical shifts of chlorinated organic compounds

Abstract

The ^(13)C chemical shifts of a variety of perchlorocarbons, their hydrogen-substituted derivatives, and chlorocarbon ketones have been determined and assigned to specific carbons by high-resolution nuclear magnetic resonance spectroscopy. The assignment of ^(13)C resonances for these substances was often aided by ^(13)-^1H couplings
\nand Overhauser enhancements observed in the carbon spectra of the hydrogen-substituted derivatives. Correlations between ^(13)C chemical shifts and structure were found for simple molecules and these correlations appear to provide the possibility of reasonable structural assignments for complex perchlorocarbons.