ethyl and j is h propylthio tolylthio tolylsulfinyl propylsulfonyl or tolylsulfonyl and j is h and q is s c 6 h 5 or so c 6 h 5 or j is methyl and q is s c 3 h 7 or so c 3 h 7 and str4 some specific examples of compounds outside the scope of structure i that are not part of the present invention because they could not be incorporated in electrophotographic elements in sufficient amounts in a non crystalline state because they were too insoluble in commonly used coating solvents e g in tetrahydrofuran dichloromethane acetone acetonitrile toluene and or lower alcohols and or were too insoluble in or incompatible with polymeric binders commonly employed in charge transport layers of electrophotographic elements e g polycarbonates polyesters polystyrenes and or copolymers of styrenes and acrylates are those having the structures str5 some specific examples of compounds outside the scope of structure i that are not part of the present invention because they were unstable over time and caused high dark decay when it was attempted to utilize them as electron transport agents in electrophotographic elements are those having the structures str6 the new chemical compounds of.