Received 29 October 2012
A trimethylphenylammonium salt of a dinuclear -oxalate complex of diperoxidomonomolybdate units, (C9H14N)2[Mo2(C2O4)(O2)4O2], was obtained from an acidic aqueous solution; the dianion is located about a centre of inversion. Each Mo atom bears two peroxide groups together with one O atom from the oxalate group in its equatorial positions and one terminal O atom as well as another O atom from the oxalate in axial positions. The oxalate group acts as a tetradentate bridging ligand and bridges between the diperoxidomolybdate units.
For the structure of the closely related tetrabutylammonium peroxidotungstate analogue, see Hashimoto et al. (1987). For the structures of related molybdate complexes, see Stomberg & Olson (1985); Bayot et al. (2004).
Data collection: CrystalClear SM (Rigaku, 2008); cell refinement: CrystalClear SM; data reduction: CrystalClear SM; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: IM2410 ).
Part of the work was supported financially by Grant in Aid No. 19550065 distributed by the Japan Society for the Promotion of Science (JSPS).
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