[Mn₄^III(μ₃-O)₂(μ-O₂CMe)₇(2,2'-bipyridine)₂]ClO₄

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.

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