Patent ID: 7501389

Claim:
A bleaching composition comprising: a) a monomer ligand, L, or transition metal catalyst thereof of a ligand having the formula (I): wherein R1 and R2 are be selected from the group consisting of: a group containing a heteroatom capable of coordinating to a transition metal; a —C1-C22-optionally substituted-alkyl; a —C6-C10-aryl; a —C1-C4-alkyl-C6-C10-aryl; and, wherein at least one of R1 and R2 is a non-aromatic hydrocarbon group, the non-aromatic hydrocarbon group being a C8-C22-alkyl chain; R3 and R4 are independently selected from: hydrogen, C1-C4-alkyl, phenyl, electron withdrawing groups and reduced products and derivatives thereof; X is selected from: C═O, a ketal derivative of C═O, a thioketal of derivative of C═O, and —[C(R6) 2 ] y — wherein y takes a value 0 or 1; each R6 is independently selected from hydrogen, hydroxyl, O—C1-C24-alkyl, O-benzyl, O—(C═O)—C1-C24-alkyl, and C1-C24-alkyl; z groups are same monocyclic or dicyclic heteroaromatic N-donor groups of the form: wherein R is —C0-C4-alkyl, and, b) the balance carriers and adjunct ingredients.