Photographic recording material and non-diffusing compounds to be used in the material which contains a photographically active group which can be split off

Photographic recording material having at least one light-sensitive silver halide emulsion layer and in association with said silver halide emulsion layer, a non-diffusing reducible compound which can be split to release a diffusible photographically useful compound, the non-diffusing reducible compound corresponding to the following formula I ##STR17## in which the substituents W, XR.sup.2, G--R.sup.1 and E may be arranged in any positions in relation to each other and in which:

• R.sup.0 represents the atoms required to complete a ring system comprising at least one aromatic or heteroaromatic ring;
• W represents a group which reduces the electron density in the ring at the position of E and is selected from the group consisting of a halogen atom, a cyano group, a nitro group, a nitroso group, a trifluoromethyl group, a quaternary ammonium group and an acyl group;
• m represents an integer of from 1 to 3;
• G represents a group from which R.sup.1 can be split off under photographic development conditions;
• R.sup.1 represents the residue of a diffusible photographically active compound;
• X represents an oxygen atom, a sulfur atom or the group --NR.sup.3 --;
• R.sup.2 represents hydrogen or a group which can be split off in alkaline medium, and
• E represents a reducible substituent selected from the group consisting of ##STR18## R.sup.3 represents hydrogen, alkyl, aryl, a heterocyclic group or aralkyl, and the compound of formula I contains at least one substituent conferring diffusion resistance.