1,4-dithio-pyrrolo-¬3,4-c pyrrole derivatives

Abstract From the Canadian patent

1,4-Dithioketo-pyrrolo-3,4-c-pyrrole Derivatives Abstract of the Disclosure, Compounds of formula (I) (1), wherein A and B are identical or different radicals of formula (2) (2), wherein each of X, Y and Z independently is a hydrogen or halogen atom trifluoromethyl, cyano, C1-C12alkyl, C1-C12alkoxy C1-C12-alkylmercapto, C2-C6alkoxycarbonyl or C2-C6dialkylamino group or is a phenoxy, phenyl-, mercapto or phenoxycarbonyl group each of which is unsubstituted or, substituted by halogen C1-C6alkyl or C1-C6alkoxy, at least one of the substituents X, Y and Z being a hydrogen atom are particularly suitable, as photoconductive substances.