Reactions of Gold(III) Complexes With Alkenes in Aqueous Solution – Formation of β-hydroxyalkylgold(III) Complexes
Rezsnyak, Chad E.
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β-hydroxyalkyl transition metal complexes are of interest as reaction intermediates in the oxidation of hydrocarbons. Complexes of this type are generally very unstable, and only a few examples have been isolated. The previously synthesized platinum complex cis- PtCl 2 (TPPTS)(C 2 H 4 ) reacts with water to generate acetaldehyde and ethanol, presumably through a β-hydroxyethylplatinum(II) complex. Substitution of Pt(II) with isoelectronic Au(III) should improve the stability of the β-hydroxyalkyl intermediate with respect to β-hydride elimination, making the reaction more selective. Gold(III) complexes react with simple, unactivated alkenes in aqueous solution to form the corresponding β-hydroxyethylgold(III) complexes, which then decompose to yield several organic products depending on the conditions employed. The synthesis, reactivity, and decomposition products of some β-hydroxyethylgold(III) complexes are reported.