Abstract: | On Tris(trialkylphosphine)gold(I)]oxonium Tetrafluoroborates and Tris(triphenylphosphine)gold(I)]sulfonium Tetrafluoroborate Et3PAu]+BF, obtained from Et3PAuCl and AgBF4 in tetrahydrofuran, reacts with KOH (molar ratio 3:1) to give the oxonium salt (Et3P)Au]3O+BF ( 1 ). The homologous t(Bu3P)Au]3O+BF ( 2 ) is generated similarly from tBu3PAuCl and Ag2O in the presence of NaBF4 in THF. The composition and identity of these two first tris(tri alkyl phosphine)gold(I)]oxonium salts have been confirmed by analytical and spectroscopic data. The compounds are useful aurating agents. From the corresponding triphenylphosphine complex and (Me3Si)2S quantitative yields of the sulfonium salt (Ph3P)Au]3S+BF ( 3 ) are obtained. Its crystal structure features monomeric cations, and in these small Au? S? Au angles indicate significant metal-metal bonding. |