Synthesis, Characterization, and X-ray Structure Determination of [Au₁₈(P)₂(PPh)₄(PHPh)(dppm)₆]Cl₃^#

The reaction of [(AuCl)2dppm] (dppm = Ph2PCH2PPh2) with PhP(SiMe3)2 and P(SiMe3)3 leads to the formation of
the gold cluster compound [Au18(P)2(PPh)4(PHPh)(dppm)6]Cl3 (1). The crystal structure investigation shows a central
Au7P2 unit formed by two P centered gold tetrahedra sharing the central gold corner. This central unit is surrounded
by a 10-membered Au5P5 ring which, together with the remaining six gold atoms, builds two Au4P rectangular and
two Au3P trigonal pyramids. The different structure motifs are connected by the phosphine ligands. The compound
has been characterized using microanalysis, IR spectroscopy, ESI-MS, and 31P NMR techniques. Luminescence
measurements have also been carried out.