5h - dibenzo (a, d) - cycloheptanylidenderivat, 5h dibenzo (a, d) cycloheptenylidenderivat, methods for their production and elektrophotographisches photosensitive aufzeichnungsmittel containing these derivatives

摘要

the invention concerns a 5h - dibenzo (a, d) cycloheptanylidenderivat and 5h - dibenzo (a, d) cycloheptenylidenderivat, by the following general formula [i] are reproduced: $f1 wherein x ch2ch2 or ch = ch; r1 and r2 aralkylgruppen alkyl groups, aromatic groups, or heterocycl european groups; r3 and r4 hydrogen atoms, alkyl groups,alkoxygruppen or kinds and ar1 an aromatic group or a heterocyclic group, a process for the production of these derivatives and elektrophotographische sensitized aufzeichnungsmaterialien in which these derivatives are used.