Bis(trimethyl­phenyl­ammonium) μ-oxalato-bis­[oxidodiperoxido­molybdate(VI)]

A trimethyl­phenyl­ammonium salt of a dinuclear μ-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.