Bis{(mu-acetato)(N,N '-dimethylformamide)[mu-bis(salicyl-idene)-1,3-propanediaminato]nickel(II)}copper(II)

The crystal structure of the title compound, [CuNi2(C17H16N2O2)(2)(C2H3O2)( 2)(C3H7NO)(2)], contains a linear hetero-trinuclear complex with a central Cu II ion located on an inversion center. The central copper(II) ion as wel l as the terminal nickel(II) ions have distorted octahedral coordination. F our O atoms from two bis(salicylidene)-1,3-propanediaminate(SALPD(2-), C17H 16N2O22-) ligands and one O atom from each bridging acetate group constitut e the octahedral coordination sphere around the Cu-II atom. The six nearest neighbors around the Ni-II atom are the two O and two N atoms of a SALPD(2 -) ligand and one O atom each from an acetate and a dimethylformamide group . The Cu-Ni pairs are triply bridged via O atoms from SALPD(2-) ligands and acetate groups. The Cu . . . Ni distance is 3.0556 (5) Angstrom. The struc ture is isomorphous with that of [CdNi2(C17H16N2O2)(2)(C2H3O2)(2)(C3H7NO)(2 )].