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

Abstract

Two new dicyanamide bridged 1D polynuclear copper(II) complexes [Cu(L 1 ){μ 1,5-N(CN) 2}] n ( 1) [ L 1 H = C 6H 5C(O)NHN C(CH 3)C 5H 4N] and [Cu(L 2){μ 1,5-N(CN) 2}] n ( 2) [ L 2 H=C 6H 5C(O)CHC(CH 3) NCH 2CH 2N(CH 3) 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 ( L 1 H) obtained by the condensation of benzhydrazide and 2-acetylpyridine is used, whereas a tridentate Schiff base ( L 2 H) 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.