{[mu-Bis(salicylidene)-1,3-propanediaminato]bis(3,5-dimethylpyridine)-nickel(II)}diiodozinc(II)

The structure of the title compound, [NiZnI2(C17H16N2O2)(C7H9N)(2)], consis ts Of doubly oxygen-bridged heteronuclear dimeric complexes. The compound i s of interest because of the magnetic superexchange interactions that occur between doubly oxygen-bridged metal ions. The Ni atom has an irregular oct ahedral environment involving two O and two N atoms from the bis(salicylide ne)-1,3-propanediaminate ligand in the equatorial plane and the N atoms fro m the two 3,5-dimethylpyridine groups in the apical positions. The coordina tion around the Zn atom is distorted tetrahedral, with an average Zn-O dist ance of 2.001(2)Angstrom and an average Zn-I distance of 2.5499 (5) Angstro m. In the bridged plane, the Ni-O1-Zn, O1-Zn-O2, Zn-O2-Ni and O2-Ni-O1 angl es are 98.82 (9), 81.2(1), 99.8(1) and 79.6(1)degrees, respectively. The Ni Zn distance is 3.0753 (7) Angstrom.