Gold III Square-Planar Complexes

Recent studies include a number of substitution reactions accompanied by or preceding reductions or ligand reactions. Stopped-flow spectrophotometry on the reaction of thiocyanate with tetrachloroaurateQlI) or tetrabromoaurate(III) revealed two kinetically distinct reaction stages. The first stages were rapid stepwise substitutions to [AuX(SCN)3] [equation (25), n = 0-3]. The solvent (H2O) path was negligible, and no 

A related study followed the reduction of [AuCU] and [AuBr4] by iodide. In these cases reduction was faster than ligand substitution, so there was no initial replacement of CF or Br by l prior to reductive elimination. 

The gold(III)-promoted hydrolysis of thioesters has a ligand substitution as its first step [equation (27)].  

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