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Acta Cryst. (2013). E69, m637-m638
[ doi:10.1107/S1600536813028894 ]

catena-Poly[N,N,N',N'-tetra­methyl­ethylendi­ammonium [[tetra­bromido­antimonate(III)]-[mu]-bromido] hemihydrate]

H. Kharrat, S. Kamoun and F. Michaud

Abstract: The asymmetric unit of the title compound {(C6H18N2)2[Sb2Br10]·H2O}n, consists of two tetra­methyl­ethylendi­ammonium cations that are located on centres of inversion, as well as one tetra­methyl­ethylendi­ammonium cation, one water mol­ecule, one distorted octahedral [SbBr6]3-anion and one bisphenoidal [SbBr4]- anion in general positions. The [SbBr6]3- and [SbBr4]- anions are linked together by two long Sb-Br bonds of 3.2709 (8) and 3.5447 (7) Å into {[Sb2Br10]4-}n chains along [001]. One of the three tetra­methyl­ethylendi­ammonium cations is disordered and was refined using a split model (occupancy ratio 0.58:0.42). The cations and the water mol­ecule are connected to the {[Sb2Br10]4-}n polymeric anions by weak N-H ...Br and O(water)-H ...Br hydrogen bonding.

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