Please use this identifier to cite or link to this item:
Title: Au(I) and Au(III) complexes of a sterically bulky benzimidazole-derived N-heterocyclic carbene
Authors: Jothibasu, R. 
Huynh, H.V. 
Koh, L.L. 
Keywords: Gold
Luminescent properties
N-Heterocyclic carbene
Oxidative addition
Issue Date: 1-Feb-2008
Citation: Jothibasu, R., Huynh, H.V., Koh, L.L. (2008-02-01). Au(I) and Au(III) complexes of a sterically bulky benzimidazole-derived N-heterocyclic carbene. Journal of Organometallic Chemistry 693 (3) : 374-380. ScholarBank@NUS Repository.
Abstract: The reaction of [AuCl(SMe2)] with in situ generated [AgCl(iPr2-bimy)] (iPr2-bimy = 1,3-diisopropylbenzimidazolin-2-ylidene), which in turn was obtained by the reaction of Ag2O with 1,3-diisopropylbenzimidazolium bromide (iPr2-bimyH+Br-, A), afforded the monocarbene Au(I) complex [AuCl(iPr2-bimy)] (1). Subsequent reaction of 1 and the ligand precursor iPr2-bimyH+BF4 -, (B) in acetone in the presence of K2CO3 yielded the bis(carbene) complex [Au(iPr2-bimy)2]BF4 (2) as a white powder in 80% yield. The oxidative addition of elemental iodine to complex 2 gave the bis(carbene) Au(III) complex trans-[AuI2(iPr2-bimy)2]BF4 (3) as an orange-red powder in 92% yield. All complexes 1-3 have been fully characterized by multinuclear NMR spectroscopies, ESI mass spectrometry, elemental analysis, and X-ray single crystal diffraction. Complexes 1 and 2 adopt a linear geometry around metal centers as expected for d10 metals. The geometry around the Au(III) metal center in 3 is essentially square-planar with two carbene ligands in trans-position to each other. Complex 3 shows absorption and photoluminescence properties owing to a ligand to metal charge transfer. © 2007 Elsevier B.V. All rights reserved.
Source Title: Journal of Organometallic Chemistry
ISSN: 0022328X
DOI: 10.1016/j.jorganchem.2007.11.003
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jan 24, 2022


checked on Jan 24, 2022

Page view(s)

checked on Jan 20, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.