LUMINESCENT METAL-CLUSTERS - SPECTROSCOPIC PROPERTIES AND X-RAY STRUCTURE OF A TRINUCLEAR GOLD(I) COMPLEX CONTAINING BIS(DIPHENYLPHOSPHINO)METHANE AND PHENYLACETYLIDE

The reaction of [Au(C=CPh)]infinity with dppm [bis(diphenylphosphino)methane] in ethanol gave [Au3(mu2-dppm)2(C=CPh)2][Au(C=Ph)2]. The complex has been characterized by X-ray crystal analysis. The structure consists of a trinuclear [Au3(mu2-dppm)2 (C=CPh)2]+ cation with the three gold atoms arranged in an isosceles triangle. The intramolecular Au...Au separations are 3.083(2) and 3.167(2) angstrom. At room temperature, the [Au3(mu2-dppm)2(C=CPh)2][Au(C=CPh)2] complex is photoluminescent in the solid state and in solution.