| abstract |
1:2-metal complex dyes of the formula n n n wherein the sympols R 1 , R 1 ′, R 2 , R 2 ′, R 3 , R 3 ′, Y, Z, n, n′, Me, M and (Kat) + are defined as in the Claims, mixtures thereof, their compositions, their production and their use as anionic dyes for dyeing substrates, especially leather, in brown to red shades. |