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Triammonium hexa-hydroxidoocta-deca-oxidohexa-molybdogallate(III) hepta-hydrate.

ABSTRACT: The title compound, (NH(4))(3)[GaMo(6)(OH)(6)O(18)]·7H(2)O, contains two centrosymmetric GaMo(6) B-type Anderson cluster units consisting of central GaO(6) octa-hedra surrounded by a hexa-gonal assembly of MoO(6) edge-sharing octa-hedra. Like other B-type Anderson clusters, where the central Mo atom is substituted with a di- or trivalent metal ion, the central six ?(3)-oxido bridges are protonated. The average Ga-O bond length is 1.97?(1)?Å, whereas the average Mo-O distances are 2.29?(2), 1.94?(1) and 1.709?(5)?Å, respectively, for Mo-(?(3)-OH), Mo-(?(2)-O) and Mo=O bonds. In the crystal structure, the Ga(?(3)-OH)(6)Mo(6)O(18) (3-) polyanionic clusters are surrounded by NH(4) (+) cations and solvent water mol-ecules, forming an extended network of hydrogen bonds.

SUBMITTER: Mensinger ZL

PROVIDER: S-EPMC2960397 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature

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Triammonium hexa-hydroxidoocta-deca-oxidohexa-molybdogallate(III) hepta-hydrate.

Mensinger Zachary L ZL Zakharov Lev N LN Johnson Darren W DW

Acta crystallographica. Section E, Structure reports online 20080109 Pt 2

The title compound, (NH(4))(3)[GaMo(6)(OH)(6)O(18)]·7H(2)O, contains two centrosymmetric GaMo(6) B-type Anderson cluster units consisting of central GaO(6) octa-hedra surrounded by a hexa-gonal assembly of MoO(6) edge-sharing octa-hedra. Like other B-type Anderson clusters, where the central Mo atom is substituted with a di- or trivalent metal ion, the central six μ(3)-oxido bridges are protonated. The average Ga-O bond length is 1.97 (1) Å, whereas the average Mo-O distances are 2.29 (2), 1.94 ...[more]

PMID: 21201249

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