The First Complexes of Tetragoldmethane CAu4
نویسنده
چکیده
Treatment o f C[B(OMe)J4 with four equivalents o f a (rerr-phosphine)gold(I) chloride LAuCl with L = P (oC 6H n)3 or (2-MeC6H4)3P in the presence o f CsF in hexamethylphosphoric triamide (HMPT) affords the first complexes o f the type (LAu)4C. The product is formed to gether with salts (LAu)5C +BF4_ as the by-product for L = tricyclohexylphosphine, from which it can be separated by fractional crystallisation. With Ph,(2-M eCH4)P only the hexacoordinate species (LAu)6C2+2 BF4~ is obtained, while with Ph(2-MeC6H4)2P a mixture o f (LAu)6C2+ and (LA u)5C + salts is generated. The title compounds are stable, colourless solids readily identified by standard analytical and spectroscopic techniques, including l3C N M R o f l3C-enriched ma terial.
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