Synthesis,characterization and luminescence of the tetranuclear gold cluster: [Au4{7,8-(PPh2)2-7,8-C2B9H10}2(PPh3)2] |
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Abstract: | A tetranuclear gold cluster has been synthesized by the reaction of Au(PPh3)NO3] with the closo carborane diphosphine 1,2-(PPh2)2-1,2-C2B10H10 in THF, and characterized by elemental analysis, FT-IR, 1H and 13C?NMR spectroscopy and X-ray structure determination. The cluster crystallizes in the triclinic Pī, a?=?15.118(8)?Å, b?=?16.057(9)?Å, c?=?24.284(13)?Å, α?=?80.822(9)°, β?=?79.624(8)°, γ?=?81.938(8)°, Z?=?2, R 1?=?0.0626, wR 2?=?0.1894. A single crystal structure determination showed that four gold atoms form a tetrahedral framework. Among these four gold atoms, two were chelated by two nido carborane diphosphine 7,8-(PPh2)2-7,8-C2B9H10]? anions coming from the degradation of the initial closo ligand 1,2-(PPh2)2-1,2-C2B10H10, while the other two were ligated to two PPh3 groups. The luminescence of this cluster was also investigated in dichloromethane solution at room temperature. |
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Keywords: | Synthesis and characterization Au cluster [7 8-(PPh2)2-7 8-C2B9H10]? Luminescence |
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