Acta Crystallographica Section E

Structure Reports Online

Volume 67, Part 5 (May 2011)

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metal-organic compounds

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Lithium difluoro(oxalato)borate tetramethylene sulfone disolvate

J. L. Allen, P. D. Boyle and W. A. Henderson

Abstract: The title compound, Li⁺·C₂BF₂O₄^-·2C₄H₈O₂S, is a dimeric species, which resides across a crystallographic inversion center. The dimers form eight-membered rings containing two Li⁺ cations, which are joined by O₂S sulfone linkages. The Li⁺ cations are ligated by four O atoms from the anions and solvent molecules, forming a pseudo-tetrahedral geometry. The exocyclic coordination sites are occupied by O atoms from the oxalate group of the difluoro(oxalato)borate anion and an additional tetramethylene sulfone ligand.

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