Carbonyl complexes of gold

The first carbonyl complex of gold, [AuCl(CO)], was prepared in 192 52080,2081 and since then only a few more derivatives have been obtained. The [AuBr(CO)] derivative was prepared later and is unstable in the solid state.2082,2083 The reductive carbonylation of Au(S03F)3 in fluorosulfonic acid leads via [Au(CO)2]+ (solvent) to solid [Au(S03F)(C0)] (Scheme 30).2084 [Au(CO)2]+ salts are produced in strongly ionizing protic acids or in Lewis acids such as SbF5. 

Carbonyl complexes of gold are only known for Au The classical example, (CO)AuCl, is obtained from (AuCl3)2 and CO at ca. 100 °C, or from AuCl and CO. A more recent preparation from commercial HAuCLi, SOCI2, and CO is more convenient and gives quantitative yields of this... 

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