NEW WAYS FOR THE PREPARATION OF HETEROCYCLIC GOLD(III) COMPLEXES

Article abstract of DOI:10.1016/S0022-328X(00)93597-6

The reaction of 1,2-dimethyl-2,3,4,5-tetraphenylstannacyclopentadiene <(Ph4C4)SnMe2> with AuCl3(tht) (tht = tetrahydrothiophen) leads to the auracyclopentadiene complexes <(Ph4C4)AuCl(tht)> or <(Ph4C4)AuCl>2, which react with Tl(acac) to give the complex <(Ph4C4)Au(acac)>.Reaction of the latter with protonated ligands (HXL) or (H2X2L2) leads to the formation of neutral mononuclear or binuclear complexes of the types <(Ph4C4)Au(XL)> (where XL is a monoanionic bidentate ligand) or <(Ph4C4)Au(X2L2)Au(Ph4C4)> (where X2L2 is a dianionic tetradentate ligand).Reaction of the acetylacetonate complex with ammonium or pyridinium salts (LH⁺X^-) gives the mononuclear neutral complexes <(Ph4C4)Au(X)(L)> (X = CH3COO or CF3COO; L = NH3 or py) or the cationic complexes <(PH4C4)AuLL'>X when X is an anion with poor coordinating capacity (X = ClO4 or BF4) and the reaction is carried out in the presence of a neutral ligand (L' = PPh3).