A series of copper(II) complexes of 2-alkyl-1-phenyl-1,3-butanedione (2-R-BzacH) and their 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) adducts have been synthesized and characterized by microanalysis, conductance, magnetic and spectral measurements. The conductivity measurements in nitromethane indicate that the complexes are non-electrolytes while the adducts are 1:1 electrolytes except Cu(n-Pr-bzac)2bipy, Cu(n-Pr-bzac)2phen, Cu(i-Prbzac) 2bipy and Cu(i-Pr-bzac)2phen that are non-electrolytes. The room temperature magnetic moments suggest that they are magnetically dilute compounds while the visible absorption spectra of the compounds showed the influence of variation of solvents and suggest plausible 4- and 5- coordinate geometries (Square planar and square pyramidal) which have been proposed, respectively.
