Synthesis and Characterization of Some Alkaline Earth Metal Ion Complexes with Acid Yellow-42 and Dyeing Preformance of Wool

Novel binary complexes of alkaline earth metal ion (Mg +2 , Ca +2 , Ba +2 , Sr +2 ) has been synthesized using acid yellow-42 [1,1'-Biphenyl]-2,2'-disulfonic acid, 4,4'-bis[(4,5-dihydro-3-methyl-5-oxo-1-phenyl- 1H-pyrazol-4-yl) azo] 1-2 ligand capable of forming stable chelat e. After syntheses the complexes were characterized by chemical as well as instrumental methods. Like elemental, IR and TGA analyses, UV- visible absorption spectra and magnetic moment. Their dyeing performance as acid dyes has been assessed on wool