condensation of o-phenylenediamine, respectively. diaminonaftaleen 4,10 - 1.8 - and benzothio - xantheen - 3.1 - dicarbonzuuranhydride and their preparation and application.

摘要

This invention relates to a compound of the formula IMAGE I or IMAGE II wherein R is a phenylene or naphtylene group. The invention also relates to a process for making the novel compounds of the invention and also to an electrophotographic recording material employing the novel compounds of the invention.