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Gem-diaurated gold(III) complexes: synthesis, structure, aurophilic interaction, and catalytic activity

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 suc...

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Hauptverfasser: Wunsch, Jonas (VerfasserIn) , Eberle, Lukas (VerfasserIn) , Mullen, Joseph P. (VerfasserIn) , Rominger, Frank (VerfasserIn) , Rudolph, Matthias (VerfasserIn) , Hashmi, A. Stephen K. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: February 18, 2022
In: Inorganic chemistry
Year: 2022, Jahrgang: 61, Heft: 8, Pages: 3508-3515
ISSN:1520-510X
DOI:10.1021/acs.inorgchem.1c03479
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/acs.inorgchem.1c03479
Volltext
Verfasserangaben:Jonas F. Wunsch, Lukas Eberle, Joseph P. Mullen, Frank Rominger, Matthias Rudolph and A. Stephen K. Hashmi
Beschreibung
Zusammenfassung: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.
Beschreibung:Gesehen am 05.07.2022
Beschreibung:Online Resource
ISSN:1520-510X
DOI:10.1021/acs.inorgchem.1c03479

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