Steric and Electronic Effects in Basic Dyes. VII – Synthesis and Electronic Absorption Spectra of Some Triphenylmethane Dyes Derived from 4-Diethylamino-4′-dimethylaminobenzophenone

A comprehensive series of triphenylmethane dyes has been prepared from 4-diethylamino-4′-dimethylaminobenzophenone and the various electronic absorption spectra have been determined. A useful general route to unsymmetrically substituted diaryl ketones has also been developed