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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 8(66), p. m1005-m1006, 2010

DOI: 10.1107/s1600536810028254

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Tetra­pyridinium μ-oxido-di-μ-sulfato-bis­[chloridodioxidomolybdate(VI)]

Journal article published in 2010 by José A. Fernandes, Ana C. Gomes ORCID, Sónia Figueiredo, Sandra Gago ORCID, André D. Lopes ORCID, Martyn Pillinger ORCID, Paulo J. A. Ribeiro-Claro, Isabel S. Gonçalves ORCID, Filipe A. Almeida Paz
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The title salt, (C(5)H(6)N)(4)[Mo(2)Cl(2)O(5)(SO(4))(2)], comprises four pyridinium cations for each [(MoClO(2))(2)(μ-O)(μ-SO(4))(2)](4-) anionic unit. The asymmetric unit consists of three aggregates of the empirical formula. The tetra-anionic bimetallic molybdenum(VI) cluster is unprecedented and contains two sulfate and one oxide bridges. This structure constitutes the first example of a non-polymeric compound with terminal oxide, sulfate and halide ligands bonded to the same metal. The hydrogen bonds connecting the pyridinium cations to the molybdenum clusters are diverse, varying from strong and directional interactions to bifurcated bonds with a subsequent loss of directionality.