Betainic azo dyestuffs containing cobalt in complex union with a colorless, tridentate ligand

A betainic cobalt complex dyestuff of the formula ##EQU2## wherein the symbol ##EQU3## represents a member selected from the group consisting of diethylenetriamine, dipropylenetriamine and monoethylene-mono-propylene-triamine, said triamines being unsubstituted or N-lower alkyl-substituted,

• .alpha.,.beta.,.gamma.-triaminopropane,
• .alpha.,.beta.,.delta.-triaminobutane,
• .alpha.,.gamma.-diamino-.beta.-(aminomethyl)-propane,
• N,n-bis-(.beta.-phenylaminoethyl)-N-ethylamine,
• N,n"-dibenzyldiethylenetriamine,
• N,n-bis-(.beta.-N'-piperidinoethyl)-N-ethylamine,
• 1-amino-2-(.beta.-amino-ethylamino)-cyclohexane,
• 2,2'-diaminodicyclohexylamine,
• 1-amino-2-(.beta.-amino-ethylamino)-benzene,
• 2,2'-diamino-diphenylamine,
• 2,6-(di-2'-pyridyl)-pyridine,
• 8-(2'-amino-phenylamino)-quinoline,
• (2-pyridylmethylene-aminoethyl)-diethylamine,
• 1-(diethylamino)-2-(2'-pyridyl-methylene-amino)-benzene,
• 1-(dimethylamino)-2-(2'-pyridyl-methylene-amino)-cyclohexane,
• 2-(2'-pyridyl-methylene-amino-methyl)-pyridine,
• 8-(2'-pyridyl-methyleneamino)-quinoline,
• 2,6-bis-(benzyl-aminomethylene)-pyridine,
• 2,6-bis-(aminomethyl)-pyridine,
• pyridine-2,6-dialdehyde dioxime,
• pyridine-2,6-dialdehyde-dihydrazone,
• 2-methoxy-4,6-dihydrazino-1,3,6-triazine and
• 2-amino-4,6-dihydrazino-1,3,5-triazine;
• and
• wherein
• --D--N=N--E-- is the divalent radical of a dyestuff selected from a benzene-azo-benzene dyestuff,
• a benzene-azo-naphthalene dyestuff, a benzene-azo-(1-phenyl-5-hydroxy-pyrazole) dyestuff, a benzene-azo-(1-phenyl-5-amino-pyrazole) dyestuff, a benzene-azo-acylaceto-phenylamide dyestuff, a benzene-azo-benzene-azo-naphthalene dyestuff, a naphthalene-azo-naphthalene dyestuff and a naphthalene-azo-(1-phenyl-5-hydroxy-pyrazole) dyestuff, any substituents of said dyestuffs being selected from hydrogen, chlorine, brome, lower alkyl, lower alkoxy, nitro, hydroxyl, lower-alkyl-sulfonyl, phenylsulfonyl, methylphenylsulfonyl, methylphenylsulfonylamino, methylsulfonylamino, acetylamino, carbo-ethoxy-amino, a radical of the formula ##EQU4## wherein R.sub.1 represents hydrogen, lower alkyl, hydroxyethyl, phenyl or lower alkylphenyl and R.sub.2 represents hydrogen, lower alkyl or hydroxyethyl;
• carboxylic acid-N-phenylamide and lower alkyl carbonyl, phenoxycarbonyl, phenylazo or naphthylazo;
• and wherein one --SO.sub.3.sup.- group is attached to either D or E;
• X is linked in ortho-position to the azo bridge to a ring carbon atom of D and represents --O--, --COO-- or lower-alkylsulfonamido, and
• X' is linked in ortho-position to the azo bridge to a ring carbon atom of E and represents --O--, --N--(lower alkyl)--, --N--(hydroxy-lower-alkyl), --N--(phenyl)-- or --NH--, said dyestuff being capable of forming a bicyclic metal complex with cobalt;
• and wherein said lower alkyl and lower alkoxy moieties have from 1 to 5 carbon atoms.