MESITYLGOLD COMPLEXES - SYNTHESIS AND REACTIVITY - CRYSTAL-STRUCTURE OF [((PH3P)AU(MU-MES)AG(THT))(2)][SO3CF3](2) (MES = MESITYL, THT = TETRAHYDROTHIOPHENE)

The complex [AuCl(AsPh3)] reacted with MgBr(mes) (mes - mesityl) to give the corresponding gold(I) derivative [Au(mes)(AsPh3)], which undergoes substitution reactions with neutral ligands to give the neutral complexes [Au(mes)L] (L = Ph2PCH2PPh2, PPh3 or PPh2Me) or with QX to afford anionic complexes Q[Au (mes) X] [X = Cl, Q = P(CHPh) Ph3; X = Br, Q = N (PPh3)2]. The latter reacted with X, (X = Cl or Br) to give gold(III) complexes, Q[Au(mes)X3] [X = Cl, Q = P(CH2Ph)Ph3; X = Br, Q = N(PPh3)2]. The reaction of [Au(mes)(PPh3)] with [Ag(OSO2CF3)L] [L = PPh3 or tetrahydrothiophene (tht)] afforded [{(Ph3P)Au(mu-mes)AgL)n][SO3CF3]n (L = PPh3, n = 1; L = tht, n = 2). The structure of [{(Ph3P)Au(P-mes)Ag(tht))2][SO3CF3]2 has been determined by a single-crystal X-ray diffraction study, which shows an Au-Ag distance of 2.8245(6) angstrom.