Structure and magnetic property of bimetallic hexanuclear cluster based on 5-chlorosalicylaldehyde oxime

The bimetallic hexanuclear cluster Mn₄Ni₂O₂(Cl-Sao)₆•(CH₃OH)₈]•10CH₃OH (1) was synthesized. Single-crystal X-ray analysis reveals that 1 consists of two Mn₂Ni(μ₃-O)(Cl-Sao)₃] subunits linked together via two pairs of long Ni-O bonds involving two oximate oxygen atoms and two phenolate oxygen atoms. Each Mn and Ni center achieves six-coordination with axialmethanol molecules. The spin centers of the Mn^III and Ni^II ions exchange magnetic coupling through O^2-, O_phenolate^- and -N-O-bridges. The magnetic properties of the cluster have been investigated.