Synthesis, characterization and luminescence of the tetranuclear gold cluster: [Au4{7,8-(PPh2)2-7,8-C2B9H10}2(PPh3)2]
- 9 May 2007
- journal article
- research article
- Published by Taylor & Francis in Journal of Coordination Chemistry
- Vol. 60 (7) , 825-831
- https://doi.org/10.1080/00958970600988006
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.Keywords
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