Synthesis and Characterization of Imidazolate-bridged Copper(II) Complexes of Triangular Skeleton

New polynuclear copper(II) complexes of the composition [CuL(im)]X (L=N,N,N′,N′-tetramethylethylenediamine (tmen), bip, phen; X=ClO4, PF6, BF4; im= imidazolate ion) have been prepared. Cryomagnetic measurements have indicated that the complexes involve a trianglar-trinuclear skeleton and an antiferromagnetic spin-exchange interaction operates between copper(II) ions; exchange integrals being evaluated at −37–−45 cm−1.Based on the Dreiding model consideration of the complexes and the crystal structure of [Cu(tmen)(imH)2](ClO4)2, a trinuclear structure of the triangular skeleton with imidazolate bridges, (Remark: Graphics omitted.), was supposed for the complexes.