Bis 1:2 chromium complexes of disazo and azo or azomethine dyes

Abstract

Disclosed are chrome complex dyes of the formula ##STR1## and of the formula ##STR2## wherein Z and Z' independently of one another are each nitrogen or --CH--; X and X' independently of one another are each oxygen, or a group of the formula --NR--, in which R is hydrogen or C.sub.1 -C.sub.4 -alkyl, provided X is oxygen when Z is --CH-- and provided X' is oxygen when Z' is --CH--; A and B independently of one another are each a diazo component of a benzene or naphthalene radical which carries the hydroxyl or carboxyl group in the o-position with respect to the azo group; C and D independently of one another are each a benzene or naphthalene radical which carries in the o-position with respect to the azo or azomethine group a hydroxyl or carboxyl group, or the radical of an aliphatic or cycloaliphatic aminocarboxylic acid, if n.sub.2 or n.sub.3 is 1 and Z or Z' is CH; E and F independently of one another are each the radical of a coupling component when Z or Z' is nitrogen, the coupling component containing in the o- and -positions with respect to the azo group the groups X and X', respectively, or the radical of an o- hydroxyaldehyde when Z or Z' is --CH--; n, n.sub.1, n.sub.2 and n.sub.3 independently of one another are each zero or 1; Ka.sup..sym. is a cation; and G is an unsubstituted or substituted benzene or naphthalene radical which contains the OH group in the o-position with respect to the coupling position on the group G; and K is the C.sub.1 -C.sub.4 -alkyl group or a --COOR or the ##STR3## group, in which R is hydrogen or C.sub.1 -C.sub.4 -alkyl.

Dependencies are inferred from the claim text.