Abstract Hexaaurated carbon complexes of the type [(R 3 PAu) 6 C](BF 4) 2, R [DOUBLE BOND] Et (2a), iPr (2b) have been prepared by the reaction of the appropriate (phosphane) gold (I) chlorides R 3 PAuCl (1a and 1b) with tetrakis (dimethoxyboryl) methane, 13 C– enriched at the central carbon atom, in the presence of excess of CsF in HMPT at room temperature. The products 2a and 2b are characterized by standard spectroscopic ...