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Tris(piperazinediium) phosphatododeca-molybo(V,VI)phosphate.

ABSTRACT: The title compound, (C(4)H(12)N(2))(3)[PMo(12)O(40)] or (H(2)pip)(3)[PMo(12)O(40)] (pip is piperazine), was prepared under hydro-thermal conditions. The asymmetric unit contains one-sixth of a mixed-valent Mo(V,VI) pseudo-Keggin-type [PMo(12)O(40)](6-) anion and half a piperazinediium cation, (H(2)pip)(2+). The discrete Keggin-type [PMo(12)O(40)](6- )anion has site symmetry and the three (H(2)pip)(2+) cations each have site symmetry at the centres of the mol-ecules. The central P atom is on special position , which is a roto-inversion position and generates the disorder of the PO(4) tetra-hedron. Furthermore, six doubly bridging oxide groups are also disordered with an occupancy factor of 0.5 for each O atom. The anions and cations are linked by an extensive network of inter-molecular N-H?O and C-H?O hydrogen bonds.

SUBMITTER: Lu YK

PROVIDER: S-EPMC2983689 | biostudies-literature | 2010 Feb

REPOSITORIES: biostudies-literature

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Tris(piperazinediium) phosphatododeca-molybo(V,VI)phosphate.

Lu Yu-Kun YK Xu Ji-Qing JQ Yu Hai-Hui HH

Acta crystallographica. Section E, Structure reports online 20100206 Pt 3

The title compound, (C(4)H(12)N(2))(3)[PMo(12)O(40)] or (H(2)pip)(3)[PMo(12)O(40)] (pip is piperazine), was prepared under hydro-thermal conditions. The asymmetric unit contains one-sixth of a mixed-valent Mo(V,VI) pseudo-Keggin-type [PMo(12)O(40)](6-) anion and half a piperazinediium cation, (H(2)pip)(2+). The discrete Keggin-type [PMo(12)O(40)](6- )anion has site symmetry and the three (H(2)pip)(2+) cations each have site symmetry at the centres of the mol-ecules. The central P atom is on spec ...[more]

PMID: 21580216

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