Thermochimica Acta, Vol.244, 277-282, 1994
Spectral and Thermal Characterization of Mixed-Ligand Complexes of Cu(II), Ni(II) and Co(II) with 3-Methoxy-4-Hydroxy Benzalidene-2-Furoic Hydrazide as the Primary Ligand and with 2-Hydroxy-5-Chloro-2’-Carboxy Azobenzene as the Secondary Ligand
The interaction of 3-methoxy-4-hydroxy benzalidene-2-furoic hydrazide and 2-hydroxy-5-chloro-2’-carboxy azobenzene with Cu(II), Ni(II) and Co(II) metal ions has been studied. The analytical data suggest the formation of 1:1:1 (M-L-L’) complexes (where L is C13H12N2O4 and L’ is C13H8N2O3Cl). Electrolytic conductance data (Delta M = 4.9-7.4 Omega(-1) cm(2) for the chloro complexes and 69.8-85.4 Omega(-1) cm(2) for the nitrate complexes) showed that the chloro complexes are non-electrolytes while the nitrate complexes are 1:1 electrolytes. Electronic spectra of these complexes show that they possess octahedral geometry. IR spectral studies show that the hydrazide ligand acts as a tridentate ligand, and the azo acts as a bidentate ligand. TG data confirm the above composition for the present complexes.