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Two W/Cu/S clusters: tetraethylammonium bromidodi‐μ

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The reaction of (Et4N)[Tp*WS3] [Tp* = hydrogen tris(3,5‐dimethylpyrazol‐1‐yl)borate] with one or two equivalents of CuBr afforded the [1 + 1] and [1 + 2] addition products (Et4N)[Tp*WS(μ‐S)2(CuBr)] {or (C8H20N)[CuWBr(C15H22BN6)S3], (I)} and (Et4N)[Tp*W(μ3‐S)(μ‐S)2(CuBr)2] {or (C8H20N)[Cu2WBr2(C15H22BN6)S3], (II)}. The anion of (I) contains a [W(μ‐S)2Cu] core formed by the addition of one CuBr unit to the [Tp*WS3] species. The anion of (II) has a butterfly‐shaped [W(μ3‐S)(μ‐S)2Cu2] core formed by the addition of two CuBr units to the [Tp*WS3] species. The [Tp*WS3] sections of each complex exhibit approximate C 3v point symmetry and have closely comparable geometry. In (II), both the anion and cation lie on a crystallographic mirror plane. The structure of (I) is noncentrosymmetric and polar.
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Document Type: Research Article

Affiliations: Department of Chemistry, Nanchang University, Nanchang 330031, People's Republic of China

Publication date: September 15, 2011

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