Oxoselenide triangular tungsten clusters: Preparation and derivatisation of [W3(μ3-Se)(μ-O)3(H2O)9]4+

The first oxo-selenide tungsten cluster [W3(μ3-Se)(μ-O)3(H2O)9]4+ has been prepared by means of in situ reductive selenidation of WO42− with H2Se at 60 °C in high yield. The aqua complex has been converted by ligand exchange into (MeImH)5[W3(μ3-Se)(μ-O)3(NCS)9] (MeIm is N-methylimidazol), whose structure was determined by X-ray analysis, and into [W3(μ3-Se)(μ-O)3(acac)3py)3]PF6. The compounds have been characterised by 1H NMR, ESI-MS, and cyclic voltammetry.

Graphical abstractFirst oxo-selenide tungsten cluster [W3(μ3-Se)(μ-O)3(H2O)9]4+ has been prepared by selenidation of WO42− with H2Se in high yield. The structure of (MeImH)5[W3(μ3-Se)(μ-O)3(NCS)9] was determined by X-ray analysis. [W3(μ3-Se)(μ-O)3(acac)3py3]PF6 was also prepared. Characterisation by 1H NMR, ESI-MS, and cyclic voltammetry.Figure optionsDownload full-size imageDownload as PowerPoint slide