Structure of a trinuclear nickel(II) complex bridged by 3,5-dimethylpyrazolate (3,5-Me 2pz), [Ni 3(3,5-Me 2pz) 4(acac) 2

Abstract

A novel trinuclear nickel(II) complex, [Ni 3(3,5-Me 2pz) 4(acac) 2] (3,5-Me 2pz=3,5-dimethylpyrazolate, acac=acetylacetone), has been prepared and characterized crystallographically. The terminal and center nickel atoms are bridged by two 3,5-Me 2pz, providing a trinuclear structure. The geometry of each nickel atom is square planar (SqPl) and these planes provide the zigzag mode. This is the first crystal structure of a trinuclear nickel(II) complex having a (SqPl)-(SqPl)-(SqPl) coordination arrangement. The Ni(1)···Ni(2) separation is 3.1972(5) Å and the Ni(II) complex has no attractive Ni(II)···Ni(II) interaction. The averaged Ni-N distance of 3,5-Me 2pz and Ni-O distance of acac are 1.876 and 1.850 Å, respectively.