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Abstract:
The structure of hexadeca-mu-acetato-tetraaquadodeca-mu(3) oxo-
dodecamanganese bis(acetic acid) tetrahydrate, [Mn12O12
(CH3COO)(16) (H2O)(4)].2CH(3)COOH.4H(2)O, known as Mn-12-
acetate, has been determined at 83 (2) K by X-ray diffraction
methods. The fourfold (S-4) molecular symmetry is disrupted by
a strong hydrogen-bonding interaction with the disordered
acetic acid molecule of solvation, which displaces one of the
acetate ligands in the cluster. Up to six Mn-12 isomers are
potentially present in the crystal lattice, which differ in the
number and arrangement of hydrogen-bonded acetic acid
molecules. These results considerably improve the structural
information available on this molecular nanomagnet, which was
first synthesized and characterized by Lis [Acta Cryst. (1980),
B36, 2042-2046].
