Synthesis and Physicochemical Studies of Some 2-substituted-1-phenyl-1,3-butanedionato Nickel(II) and Copper(II) Complexes And Their 2,2?-Bipyridine and 1,10-Phenanthroline Adducts

The nickel(II) and copper(II) complexes of 2-substituted-1-phenyl-1,3-butanedione (2-R-bzacH, R=Cl, NO2) andtheir 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) adducts have been synthesized and characterized bymicroanalysis, conductance, magnetic and spectral measurements. The conductivity measurements in nitromethaneindicate that the complexes are non-electrolytes while all the adducts are electrolytes except Ni(NO2-bzac)2bipy andCu(NO2-bzac)2phen which are non-electrolytes. The room temperature magnetic moments suggest that theCu(NO2-bzac)2 is a dimer while the visible absorption spectra of the compounds suggest plausible 4-, 5- and6-coordinate geometry for these compounds. The infrared spectra of the complexes showed that lower frequencyshifts of varying magnitudes were observed in the carbonyl stretching frequencies on complexation.