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Coordination chemistry of [Nb2(S2)2]4+ clusters: Preparation and crystal structures of K4[Nb2(S2)2(C2O 4)4] · 6H2O and(NH4)6[Nb2(S2)2(C 2O4)4](C2O4)

Lookup NU author(s): Dr Maxim Sokolov, Emeritus Professor Bill Clegg


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Bis(disulfido)bridged NbIV cluster oxalate complexes [Nb2(S2)2(C2O4) 4]4- were prepared by ligand substitution reaction from the aqua ion [Nb2(μ-S2)2(H2O) 8]4+ and isolated as K4[Nb2(S2)2(C2O 4)4] · 6 H2O (1), (NH4)6[Nb2-(S2)2(C 2O4)4](C2O4) (2) and Cs4[Nb2(S2)2(C2O 4)4] · 4 H2O (3). The crystal structures of 1 and 2 were determined. The crystals of 1 belong to the space group P1, a = 720.94(7) pm, b = 983.64(10) pm, c = 1071.45(10) pm, α = 109.812(1)°, β = 91.586(2)°, γ = 105.257(2)°. The crystals of 2 are monoclinic, space group C2/c, a = 1567.9(2) pm, b = 1906.6(3) pm, c = 3000.9(4) pm, β = 95.502(2)°. The packing in 2 shows alternating layers of cluster anions and of ammonium/uncoordinated oxalates perpendicular to the [1 0 1] direction. Vibration spectra, electrochemistry and thermogravimetric properties of the complexes are also discussed. © WILEY-VCH Verlag GmbH, 2001.

Publication metadata

Author(s): Sokolov M, Virovets A, Clegg W

Publication type: Article

Publication status: Published

Journal: Zeitschrift fur Anorganische und Allgemeine Chemie

Year: 2001

Volume: 627

Issue: 1

Pages: 119-123

ISSN (print): 0044-2313

ISSN (electronic): 1521-3749

Publisher: Wiley - V C H Verlag GmbH & Co. KGaA


DOI: 10.1002/1521-3749(200101)627:1<119::AID-ZAAC119>3.0.CO;2-E


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