Abstract

Single-crystals of a new compound W5Br12 · SbBr3 (I) were isolated as a reaction product from the reduction of WBr6 with elemental antimony at 250°C. The crystal structure was determined by single-crystal X-ray diffraction analysis. The structure contains square-pyramidal tungsten clusters being linked into infinite [(W5Br 8 i )Br 3 a Br 2 2/a-a ] chains through shared W-Bra-a-W contacts of adjacent clusters. The structure of the adduct I can be viewed as an intercalation compound composed of double-layers of cluster chains alternating with mono-layers of SbBr3 molecules.

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