Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 1 (January 2013)

metal-organic compounds

sf3186 scheme

Acta Cryst. (2013). C69, 37-40 [ doi:10.1107/S0108270112049803 ]

Potassium, rubidium and ammonium salts of -(formato-²O:O')--oxido-bis[oxidobis(peroxido-²O,O')molybdate(VI)]

M. Takehara and M. Hashimoto

Abstract: The unit-cell parameters of the three title salts, namely, tripotassium, K₃[Mo₂(CHO₂)O₃(O₂)₄], trirubidium, Rb₃[Mo₂(CHO₂)O₃(O₂)₄], and triammonium [mu] -(formato- [kappa] ²O:O')- [mu] -oxido-bis[oxidobis(peroxido- [kappa] ²O,O')molybdate(VI)], (NH₄)₃[Mo₂(CHO₂)O₃(O₂)₄], which were all crystallized at pH 3, are quite similar, but the potassium and rubidium salt structures are noncentrosymmetric, whereas that of the ammonium salt is centrosymmetric. Formate acts as an O:O'-bridging ligand in the complex anion and is bound to a [mu] -oxido-bis(oxidodiperoxidomolybdate) unit.

Formula: K₃[Mo₂(CHO₂)O₃(O₂)₄], Rb₃[Mo₂(CHO₂)O₃(O₂)₄] and (NH₄)₃[Mo₂(CHO₂)O₃(O₂)₄]


	Structure factor file (CIF format) (150.5 kbytes) [ doi:10.1107/S0108270112049803/sf3186Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (161.3 kbytes) [ doi:10.1107/S0108270112049803/sf3186IIsup3.hkl ] Contains datablock II

	Structure factor file (CIF format) (87.7 kbytes) [ doi:10.1107/S0108270112049803/sf3186IIIsup4.hkl ] Contains datablock III

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