Abstract
The proton n.m.r. spectra of the conjugate acids of some ketones and carboxylic acids, and of ethyl acetate, nitromesitylene, and ethyl alcohol have been observed. A correlation has been found between the chemical shift of the C=OH+ proton of the conjugate acids of some para-substituted acetophenones and their pKBH + and σ+ values. The rates of proton loss from these conjugate acids have been obtained.