A Thermally Stable Gold(III) Hydride: Synthesis, Reactivity, and Reductive Condensation as a Route to Gold(II) Complexes

Abstract

Going for gold: The first thermally stable gold(III) hydride [(C N C)*AuH] is presented. It undergoes regioselective insertions with allenes to give gold(III) vinyl complexes, and reductive condensation with [(C N C)*AuOH] to the air-stable Au(II) product, [(C N C)*(2)Au(2)], with a short nonbridged gold-gold bond.

Gold peroxide complexes and the conversion of hydroperoxides into gold hydrides by successive oxygen-transfer reactions

“…We found recently that C^N^C pincer ligands based on the dianionic 2,6-diphenylpyridine framework are capable of stabilizing a number of novel gold(III) compound types 32,33 , including the first examples of gold(III) hydrides and olefin complexes 34,35 . Given the importance of oxygen ligands in oxidations as well as water cleavage reactions, we decided to explore the reactivity of such gold(III) pincer complexes towards oxygen ligands, including possible Au-O2Au-H interconversions.…”

Die Suche nach einkernigem Gold(II) und seine mögliche Rolle in Photokatalyse und Medizinalchemie

“…[5] Dieser Pfad wird besonders durch die Au-Au-Bindung potentiell verbrückende Liganden, wie SO 4 2À (Au-Au2 .490 ), [CH 2 PR 2 CH 2 ] À oder [S 2 CNR 2 ] À (2.550-2.694 ), bevorzugt. [14] Die homolytische Bindungsspaltung in einkernige Fragmente Au II (C^N^C) bençtigt 198 AE 1kJmol À1 . [13] Kürzlich verwirklichten Bochmann et al im Komplex (C^N^C)Au II -Au II -(C^N^C) mit einem doppelt cyclometallierten 2,6-Bis(4'-tertbutylphenyl)pyridin-Liganden eine weitere unverbrückte, kurze Au-Au-Bindung (Au-Au2 .4941 )( Schema 1).…”

Fundamental Elementary Steps in Gold Chemistry

“…Bochmann et al [122] reported on a gold(III) hydride pincer complex that is unreactive towards several alkynes and alkenes, but undergoes insertion reactions with allenes, yielding regioselectively Au(III)vinyl complexes (Scheme 3.46).…”