Dye substituted cyclic 1,3-sulfur-nitrogen compounds as dye image-forming materials in photography

This invention relates to color providing compounds useful as dye image-forming materials in color photographic processes. These compounds comprise a complete dye, i.e., a dye radical comprising the chromophoric system of a dye, such as, an azo, anthraquinone, azomethine or phthalocyanine dye and a cyclic moiety capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex containing the group wherein said C atom common to said S and N atoms is a tetrahedral carbon atom possessing 4 single covalent bonds. Preferred compounds comprise the radical of an organic dye substituted with [(L)m-1-Y] wherein L is a divalent organic linking group containing at least one carbon atom, m is a positive integer 1 or 2, and Y is a cyclic moiety selected from (a) WHEREIN R1 is hydrogen or a monovalent organic radical; R2 is hydrogen or a monovalent hydrocarbon radical; and Z represents the carbon atoms necessary to complete a ring system having 4 to 20 atoms, said cyclic moiety (a) being attached to a carbon atom of said dye by a single covalent bond when m is 1 and attached to the carbon atom of said linking group L by a single covalent bond when m is 2 and (b) WHEREIN R1 and Z have the same meaning given above, said cyclic moiety (b) being attached to a carbon atom of said dye by a spiro union when m is 1 and attached to the carbon atom of said linking group L by a spiro union when m is 2.