| abstract |
A silver halide photographic element comprising a silver halide emulsion in reactive association with a compound of the formulan nwherein R i , R 2 and R 3 are each independently an aryl, alkyl or arylalkyl group; and wherein Z represents the atoms necessary to form a 5 or 6 membered heterocyclic ring and contains at least one atom selected from N, O, S, and Se; and methods of making same. |