Synthesis, crystal structures and magnetic studies of dicyanamide bridged two new 1D copper(II) complexes

摘要

Two new dicyanamide bridged 1D polynuclear copper(II) complexes [Cu(L-1){mu(1,5)-N(CN)(2)}](n) (1) [(LH)-H-1 = C6H5C(O)NHN=C(CH3)C5H4N] and [Cu(L-2){mu(1,5)-N(CN)(2)}](n) (2) [(LH)-H-2 = C6H5C(O)CHC(CH3)=NCH2CH2N(CH3)(2)] have been synthesised and structures of both the complexes and their crystal packing arrangements have been established by X-ray crystallography. For complex 1, a tridentate hydrazone ligand ((LH)-H-1) obtained by the condensation of benzhydrazide and 2-acetylpyridine is used, whereas a tridentate Schiff base ((LH)-H-2) derived from benzoylacetone and 2-dimethylaminoethylamine is employed for the preparation of complex 2. Variable temperature magnetic susceptibility measurement studies indicate there are weak antiferromagnetic interactions with J values -0.10 and -1.41 cm(-1) for 1 and 2, respectively. (C) 2007 Elsevier B.V. All rights reserved.