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metal-organic compounds
The anhydrous form of a known tetramanganese cluster, which was previously isolated in its trihydrate form, has been prepared from a different starting material. The new complex, bis(μ3-oxo)-1:2:4-κ3O;2:3:4κ3O-heptakis(μ-acetato)-1:2κ4O:O';1:4κ2O:O';2:3κ2O:O';2:4κ2O:O';3:4κ4O:O'- bis(2,2'-bipyridine)-1κ2N,N';3κ2N,N'-tetramanganese perchlorate, [Mn4(O)2(C2H3O2)7(C10H8N2)2]ClO4, crystallizes in the monoclinic space group C2/c, in a higher symmetry compared to the previous form. A crystallographic twofold axis passes through the centre of the molecule. The fundamental structure of the complex clearly resembles that of the form already reported.