Acta Cryst. (2008). E64, m3-m4  [ doi:10.1107/S1600536807061314 ]

-4,4'-Diazenediyldiphthalato-²O²:O^2'-bis[pentaaquamanganese(II)] tetrahydrate

J.-W. Bai, J. Wang, Y. Hou, B.-Z. Zhao and Q. Fu

Abstract: The dinuclear complex in the title compound, [Mn₂(C₁₆H₆N₂O₈)(H₂O)₁₀]·4H₂O, lies on an inversion center. Two delocalized carboxylate groups are each connected in a monodentate fashion to two similar pentaaquamanganese units, whereas the other two localized carboxylate groups are uncoordinated. The metal ion has octahedral coordination, with the O atom of a carboxylate group and three coordinated water molecules forming the equatorial plane [Mn-O_COO = 2.143 (4) Å] and two water molecules occupying the axial positions. The architecture is further consolidated by extensive hydrogen bonds for which coordinated water molecules serve as donors or acceptors.

Online 6 December 2007

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