Manganese complexes as catalysts for peroxygenated compounds to clean hard surfaces, especially dishes

A method of cleaning a hard surface, which comprises contacting the surface with a solution containing a peroxy compound and, as catalyst for the peroxy compound, a manganese complex of the formula (1) or (2)

• wherein
• Y is linear or branched alkylene of formula —[C(R1)2]m, wherein m is an integer from 2 to 8 and each R1 is independently hydrogen or C1-C4alkyl;
• —CX═CX—, wherein X is cyano, linear or branched C1-C8alkyl or di(linear or branched C1-C8alkyl)amino;
• —(CH2)q—NR1—(CH2)q—, wherein R1 is as defined and q is 1, 2, 3 or 4;
• or a 1,2-cyclohexylene or 1,2-phenylene radical of formula
• wherein R8 is hydrogen, CH2OH, CH2NH2 or SO3M, wherein M is hydrogen;
• an alkali metal atom, ammonium or the cation of an organic amine,
• R5 and R6 are each independently of the other hydrogen;
• linear or branched C1-C4alkyl;
• linear or branched C1-C8alkylene-R2, wherein R2 is OR1, COOR1 or NR3R4;
• unsubstituted aryl or aryl substituted by cyano, halogen, OR1, COOR1, nitro, linear or branched C1-C8alkyl, NR3R4, wherein R3 and R4 are each independently of the other hydrogen or linear or branched C1-C12alkyl, or by —N⊕R1R3R4, wherein R1, R3 and R4 are as previously defined,
• each R7 independently of the others is hydrogen or C1-C4alkyl,
• Z1 and Z2 are each independently of the other hydrogen, hydroxy, C1-C4alkoxy or di(C1-C4alkyl)amino, and
• A is a charge-balancing anionic ligand, with the proviso that, in the compounds of the formula (1), when Y is 1,2-phenylene the substituents Z1, Z2, R5 and R6 may not all simultaneously be hydrogen.