Acta Cryst. (2004). E60, i33-i36  [ doi:10.1107/S1600536804002302 ]

A novel protonated hexatungstoplatinate(IV), Na_5.5[H_2.5PtW₆O₂₄]·17H₂O

U. Lee and H.-C. Joo

Abstract: The novel protonated hemiundecasodium hemipentahydrogen hexatungstoplatinate(IV) heptadecahydrate, Na_5.5[H_2.5PtW₆O₂₄]·17H₂O, crystallizes in the triclinic system in space group P. The protonated O atoms were identified by considering three factors: inter-polyanion hydrogen bonds, elongation of W-O(H) bond distances, and bond angles of W-O(H)-W. The [H_2.5(PtW₆O₂₄)]^5.5- polyanion has no inversion symmetry, and it forms a dimer, viz. [H₅(PtW₆O₂₄)₂]^11-, via five strong hydrogen bonds.

Online 7 February 2004

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