| 摘要 |
1:2 metal complexes of the formula <IMAGE> wherein each of R1 and R3 is independently hydrogen or nitro, with the proviso that when a ring has two nitro groups, they are meta to each other, each of R2 and R4 is independently hydrogen, chloro or -SO3M, each of R5 and R6 is independently hydrogen, -COR7, -CONHR8 or -SO2R9, wherein R7 is C1-6alkyl, C1-6alkoxy, phenyl(C1-4-alkyl) or phenyl (C1-4alkyl) the phenyl group of which is substituted by 1 or 2 substituents selected from halo, C1-4-alkyl, C1-4alkoxy, nitro, amino, -COOM, -SO3M and acetamido, R8 is hydrogen; C1-6alkyl; phenyl; phenyl substituted by 1 or 2 substituents selected from halo, C1-4alkyl, C1-4alkoxy, nitro, amino, -COOM, -SO3M and acetamido; naphthyl or naphthyl monosubstituted by chloro, amino, phenylamino, acetamido, benzamido or -SO3M, and R9 is C1-6alkyl, phenyl or phenyl substituted by 1 or 2 substituents selected from halo, C1-4alkyl, C1-4alkoxy, nitro, amino, -COOM, -SO3M and acetamido, and Me is chromium or cobalt, wherein each M and M(+) is independently hydrogen or a non-chromophoric cation, with the provisos that (1) when both R5 and R6 are hydrogen, both R1 and R3 are hydrogen and at least one of R2 and R4 is chloro, and (2) the -NHR5 group is in the 2- or 3-position of Ring A and the -NHR6 group is in the 2- or 3-position of Ring B, and mixtures thereof, are useful as dyes for dyeing or printing various materials, such as natural and synthetic polyamides and particularly for dyeing artificially produced oxide layers on aluminum or aluminum alloys.
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