Synthesis and spectroscopic characterization of new ONO donor AZO ligands and its Cu (II)-complexes
Mrinal Kanti Paira
Aryl diazonium salt of antranilic acid and 2-aminophenol are coupled with acetyl acetone to synthesize ONO donor tridentate ligands of the type R-C6H5-N=N-C(=C(OH)CH3)COCH3 (R = COOH [HL1], OH [HL2]). The ligands can show keto-enol tautomerism. The 1H NMR spectra suggest that they exist in enol form. They can bind to the metal through O, N and O donor centers. The reaction of Cu(NO3)2 with HL1 and HL2 in presence ammonium hydroxide formed chelate complexes of the type Cu2L12 and Cu2L22. Copper (II) complexes have been confirmed by 1H NMR, FT-IR spectra, magnetic moment and elemental analysis. The solution spectra complexes exhibit both ILCT and MLCT bands.
Mrinal Kanti Paira. Synthesis and spectroscopic characterization of new ONO donor AZO ligands and its Cu (II)-complexes. International Journal of Advanced Research and Development, Volume 3, Issue 1, 2018, Pages 277-282