A Linear Trinuclear NiII–MnII–NiIIComplex with a μ-Acetato Bridge: Bis{(μ-acetato)[μ-bis(salicylidene)-1,3-propanediaminato](N,N-dimethylformamide)nickel(II)}manganese(II)

Abstract

The structure of the title compound, [Mn{Ni(C 2 H 3 O 2 )(C 3 H 7 NO)(C 17 H 16 N 2 O 2 ))} 2 ], consists of a linear heterotrinuclear unit with a central Mn II ion. Both the terminal Ni II ions and the central Mn II ion have irregular octahedral coordinations. The central Mn II ion is located on the inversion centre. Each pair of metal ions is triply bridged via O atoms from the N,N'-bis(salicylidene)-1,3-propanediaminato (SALPD 2- ) ligands and from the acetate groups. The coordination around the Mn II ion consists of four O atoms from two SALPD 2- ligands, and one O atom from each of two acetate ligands. The coordination of each terminal Ni II ion is provided by the two O and two N atoms from a SALPD 2- ligand, and by one O atom each from a bridging acetate and a dimethylformamide (dmf) ligand. The dmf and acetate ligands are trans about the terminal Ni II ion. The average Ni-O and Ni-N distances for the terminal ions are 2.071(2) and 2.026(2)A, respectively. The Ni...Mn distance is 3.133 (2) A.