| abstract |
1:1 Nickel complexes of azines of the formula I or of a tautomer thereof <IMAGE> (I) wherein R1 is hydrogen or methyl, R2 is methyl or carbamoyl, R3 is hydrogen or chlorine, R4 is hydrogen, chlorine, methyl, trifluoromethyl or sulfamoyl, R5 is hydrogen or chlorine, R6 is hydrogen, chlorine, bromine, methyl, methoxy, trifluoromethyl, carbamoyl or alkanoylamino containing 2 to 4 carbon atoms, with the proviso that, if R2 is carbamoyl, at least two of the substituents R3 to R6 are halogen atoms and/or trifluoromethyl groups, color plastics, lacquers and printing inks in orange to red shades of outstanding fastness properties. |