The carbonyl group frequency. Part I. Aliphatic ketones

Abstract

The carbonyl stretching frequencies for vapours and solutions of a series of methyl substituted acetones have been recorded. The variation in frequency through this series is not accompanied by any significant change in hydrogen-bonding ability and is attributed largely to changes in the steric requirements of the alkyl groups. The frequencies conform to an expression ν(solution)=nν(vapour)+c, which can be rearranged to the BHW equation used for the correlation of solvent effects.