A mixed-valence [CoCo] cluster with defect disk-shaped topology.

The employment of the new Schiff base ligand 2-[(4-chloro-2-hydroxybenzylideneamino)methyl]phenol (HL) bearing ON donors for the preparation of a novel Co cluster is reported. The hexanuclear cobalt complex, namely, di-μ-acetatotetrakis{μ-2-[(4-chloro-2-oxidobenzylideneamino)methyl]phenolato}tetra-μ-methanolato-tetracobalt(II)dicobalt(III), [CoCo(CHClNO)(CHCOO)(CHO)], was obtained using Co(CHCOO)·4HO and HL as starting materials in MeOH under solvothermal conditions. The six metal ions are linked together by the μ-O atoms of four deprotonated MeOH molecules, two CHCOO units and six phenolate O atoms of four L ligands to form a defect disk-shaped topology. DC magnetic susceptibility investigations revealed the existence of antiferromagnetic interactions in the Co cluster.