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Gem -Diaurated Gold(III) Complexes: Synthesis, Structure, Aurophilic Interaction, and Catalytic Activity.

Jonas F WunschLukas EberleJoseph P MullenFrank RomingerMatthias RudolphA Stephen K Hashmi
Published in: Inorganic chemistry (2022)
We present a protocol to synthesize air stable gem -diaurated gold(III) compounds from 1,3-diketones in a single cycloauration step with tetrachloroauric acid. So far related species were only accessible from phosphonium bis(ylide) ligands which hold the two gold atoms in close proximity. Lacking such a constraint, our compounds show the longest Au-Au distances of all gem -diaurated carbons, ranging from 3.26 to 3.32 Å. Modeling based on results of CCSD(T) calculations shows no stabilization by aurophilic interactions for our gold(III) systems, compared to 9.1 kcal/mol for gold(I) gem -diauration. This demonstrates no aurophilic interactions are needed for the isolation of air stable gem -diaurated gold(III) complexes. We show the new gem -diaurated gold(III) compounds are active in the gold-catalyzed phenol synthesis and highly active in the cycloisomerization of an N -propargylcarboxamide; here, we obtained the so far highest known TON of over 2500 per gold atom with respect to the oxazole formation.
Keyphrases
  • silver nanoparticles
  • randomized controlled trial
  • molecular dynamics
  • sensitive detection
  • gold nanoparticles
  • molecular dynamics simulations
  • monte carlo