Preparation, crystal structure, magnetic properties, and chemical reactions of a hexanuclear mixed valence manganese carboxylate

Abstract
The antiferromagnetic mixed valence manganese complex [Mn6O2(Me3CCO2H)4(Me3CCO2)10] has been prepared by the reaction of MnCO3 with pivalic acid in toluene, and its molecular structure, determined by X-ray methods, comprises the new polynuclear cluster grouping of two tetrahedral oxygen-centred tetramanganeses clusters sharing an edge; further cluster complexes have been prepared by reaction of this complex with donor molecules.

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