Electron donor precursors and photographic elements...

Details Electron donor precursors and photographic elements... Electron donor precursors and photographic elements...

G - Physics

03

C

96/127, 96/35, 2

G03C 1/40 (2006.01) C07D 275/06 (2006.01) G03C 8/00 (2006.01) G03C 8/08 (2006.01)

Patent

CA 1138246

Abstract of the Disclosure Novel electron donor precursors have the structure: Image wherein: Z represents the atoms to complete a mono-, bi- or tricyclic ring system, each ring of which contains 5 to 6 nuclear atoms; n is 1 or 2; R1 is a monovalent aromatic group when n is 1 and a bivalent aromatic group when n is 2; and R2 represents hydrogen, an alkyl Group, an aryl group, an acyl group, an ester group or an amido group. The compounds are useful in photographic elements, film units and processes to provide electrons to immobile compounds which must accept at least one electron before releasing a diffusible dye or photographic reagent.

348060

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