The differences in the rate of hydrolysis of a number of 2, 2-&ubstituted cycloalkanoneketimines, to the corresponding ketones has been reported.'In order to obtain quantified data on related model compounds, we synthesized a series of acetophenonimines by the reaction of phenylmagne-sium halides with alkyldiphenylacetonitriles (1) in which the alkyl group was methyl, ethyl, butyl, pentyl or ...