Synthesis, Characterization and Spectroscopic Properties of New Azo Dyes Derived From Aniline Derivatives Based on Acetylacetone and Azo-Metal (Ii) Complexes and Singular Value Decomposition (Svd) Investigation

Four new azo-dyes, 3-phenyl azopentane-2,4-dion (la), 3-(4-nitro phenyl azo)-pentane-2,4-dion (lp), 3-(2-nitro phenyl azo)-pentane-2,4-dion (lo) and 4-(1-acetyle-2-oxo-propyl azo)-benzene sulfonate sodium (ls), were synthesized from aniline, 4-nitroaniline, 2-nitroaniline and sulfanilic acid with acetylacetone, respectively. reaction of these new dyes with acetate salts of copper(ii), nickel(ii) and cobalt(ii) in molar ratios of 1:2 were carried out to produce azo metal (ii) complexes with the general stoichiometry; cul2, col2 and nil3 in complexes. structure of azo dyes was characterized using ft-ir,1h nmr,13c nmr, uv-visible and also the corresponding metal (ii) complex were characterized by ft ir, uv-visible and chn and xrd analysis techniques. elemental analysis and spectral data indicated that the dye as a ligand with two teeth, n and o, acts as a bidentate ligand. differences in absorption maxima of azo ligands compared to those corresponding complexes were also studied. also, in this work, singular value decomposition (svd) as a chemometric method was used to determine the cu(ii), co(ii) and ni(ii) complexes with the mentioned ligands in methanol by uv-vis spectrophotometry. svd method confirmed the formation of cul2, col2 and nil3 complexes.