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The gold(1) complexes AuCl(PR,) (PR, = PPh,, PMePh,, and PMe,Ph) react with Ti(q-C,H,), to form a variety of cationic gold cluster complexes; a single-crystal X-ray analysis of one of these, [Au,,-(PMe,Ph) loC12] (PF,),, has confirmed a centred icosahedral geometry for the cluster, in agreement with an earlier theoretical prediction.' F. A. Vollenbroek, Ph.D. Thesis, Catholic University of Nijmegen, 1979, has synthesised the compound Au,,(dppm),(NO,), [dppm = bis(dipheny1phosphino) methane] which appears to have an icosahedral cluster unit. However, crystallographic disorder and the possibility that the unit cell contains a second unidentified cluster compound have limited the characterization of this compound. carbaboranes C,B,,H,, as ortho, meta, and para.