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Double Salt Crystal Structure of Hexa-Sodium Hemiundeca-Hydrogen α-hexa-molybdoplatinate(IV) Heminona-Hydrogen α-hexa-molybdoplatinate(IV) Nona-Cosa-Hydrate: Di-Hydrogen Disordered-Mixture Double Salt

Double Salt Crystal Structure of Hexa-Sodium Hemiundeca-Hydrogen α-hexa-molybdoplatinate(IV) Heminona-Hydrogen α-hexa-molybdoplatinate(IV) Nona-Cosa-Hydrate: Di-Hydrogen Disordered-Mixture Double Salt

Hea-Chung Joo, Ki-Min Park, Uk Lee

Acta Crystallogr E Crystallogr Commun. 2015 Sep 26;71(Pt 10):1250-4.

PMID: 26594418

Abstract:

The title double salt containing two distinct, differently protonated hexa-molybdoplatinate(IV) polyanions, Na6[H5.5 α-PtMo6O24][H4.5 α-PtMo6O24]·29H2O, has been synthesized by a hydro-thermal reaction at ca pH 1.80. The positions of the H atoms in the polyanions were established from difference Fourier maps and confirmed by the inter-polyanion hydrogen bonds, bond-distance elongation, and bond-valence sum (BVS) calculations. The fractional numbers of H atoms in each polyanion are required for charge balance and in order to avoid unrealistically short H⋯H distances in the inter-polyanion hydrogen bonds. Considering the disorder, the refined formula of the title polyanion, {[H5.5 α-PtMo6O24]; polyanion (A) and [H4.5 α-PtMo6O24]; polyanion (B)}(6-), can be rewritten as a set of real formula, viz. {[H6 α-PtMo6O24]; polyanion (A). [H4 α-PtMo6O24]; polyanion (B)}(6-) and {[H5 α-PtMo6O24]; polyanion (A). [H5 α-PtMo6O24]; polyanion (B)}(6-). The polyanion pairs both form dimers of the same formula, viz. {[H10 α-Pt2Mo12O48]}(6-) connected by seven inter-polyanion O-H⋯O hydrogen bonds.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42411245	2-Ketobutyric acid-4-13C sodium salt hydrate			Price

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