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Updated: May 9, 2026

Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies
Published on: November 27, 2013
σ-π-Diauration as an alternative binding mode for digold intermediates in gold(i) catalysis
1Caudill Laboratories, Department of Chemistry, University of North Carolina at Chapel Hill, NC 27599, USA.
Abstract:
While investigating the gold(i)-catalyzed intramolecular hydroarylation of allenes, the structure of a digoldvinyl intermediate was verified. Instead of the previously proposed geminally diaurated binding mode for the digold when L = PPh3, an alternative σ-π-diauration mode was observed with the bulkier ligand L = P(o-Tol)3. Reactivity studies indicate the σ-π-mode has a disproportionate effect on protonolysis reactivity.
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