Hirtenlehner, Christa and Krims, Charlotte and Hoelbling, Johanna and List, Manuela and Zabel, Manfred and Fleck, Michel and Berger, Raphael J. F. and Schoefberger, Wolfgang and Monkowius, Uwe (2011) Syntheses, crystal structures, reactivity, and photochemistry of gold(III) bromides bearing N-heterocyclic carbenes. DALTON TRANSACTIONS, 40 (38). pp. 9899-9910. ISSN 1477-9226,
Full text not available from this repository. (Request a copy)Abstract
Gold(I) complexes bearing N-heterocyclic carbenes (NHC) of the type (NHC)AuBr (3a/3b) [NHC = 1-methyl-3-benzylimidazol-2-ylidene (= MeBnIm), and 1,3-dibenzylimidazol-2-ylidene (= Bn(2)Im)] are prepared by transmetallation reactions of (tht)AuBr (tht = tetrahydrothiophene) and (NHC)AgBr (2a/2b). The homoleptic, ionic complexes [(NHC)(2)Au]Br (6a/6b) are synthesized by the reaction with free carbene. Successive oxidation of 3a/3b and 6a/6b with bromine gave the respective (NHC)AuBr3 (4a/4b) and [(NHC)(2)AuBr2]Br (7a/7b) in good overall yields as yellow powders. All complexes were characterized by NMR spectroscopy, mass spectrometry, elemental analysis and single crystal X-ray diffraction. Reactions of the Au(III) complexes towards anionic ligands like carboxylates, phenolates and thiophenolates were investigated and result in a complete or partial reduction to a Au(I) complex. Irradiation of the Au(III) complexes with UV light yield the Au(I) congeners in a clean photo-reaction.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | OXIDATIVE ADDITION; REDUCTIVE ELIMINATION; ELECTRONIC-STRUCTURES; CATALYTIC-ACTIVITY; LIGANDS SYNTHESIS; SILVER COMPLEXES; GOLD COMPLEXES; SOLID-STATE; BASIS-SETS; CHEMISTRY; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Central Analytical Services |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jun 2020 10:04 |
| Last Modified: | 29 Jun 2020 10:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/21553 |
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