Department of Chemistry, A. P. S. University, Rewa-486 003, India Manuscript received 15 September1998, revised .2 February 1999, accepted 11 March 1999 X-Band epr spectra of polycrystalline samples of some copper(II) mononuclear and copper(II)-copper(II)/copper(II)-nickel(II) binuclear complexes using diethylenetriamine and imidazole have been reported.