Nuclear magnetic resonance spectroscopy. Carbon-13 chemical shifts in cycloalkanones

Abstract

High-resolution ^(13)C nuclear magnetic resonance spectra have been obtained of a number of cycloalkanones. Simple additivity relationships were found which enable reasonable prediction of the chemical shifts of alkyl-substituted cyclohexanones. Attempts have been made to assign conformations to the higher cycloalkanones on the basis of their ^(13)C chemical shifts.