Merocyanines and p-Dialkylamino Styryl Dyes Derived from 1, 2, 6, 7-Dibenzoxanthone

A number of morocyanines and \(p\)-dialkylamino styryl dyes have been prepared from 1, 2, 6, 7- dibenzoxanthone. Utilising the absorption maxima data of these dyes the relative order of acidities of ketomethylene compounds used in t.hf! synthesis of merocyanines have been studied. The influence of structural changes on absorption of the dialkylamino styryl dyes is also discussed