Synthesis and characterization of gold(III) complexes bearing a picoline-functionalized N-heterocyclic carbene

Autor(en)

Christoph Topf, Christa Hirtenlehner, Michel Fleck, Manuela List, Uwe Monkowius

Abstrakt

3-Methyl-1-(2-picolyl)-imidazolium chloride (1) has been synthesized and used as a precursor for the preparation of the (NHC)AgCl complex [NHC = 3-methyl-1-(2-picolyl)imidazol-2-ylidene] (2). Transmetalation of 2 with (tht)AuBr (tht = tetrahydrothiophene) yields the corresponding (NHC)AuBr complex 3, which is further oxidized by Br2 to give the (NHC)AuBr3 compound 4. Treatment of 4 with one equivalent of solid AgBF4 affords the [(NHC)AuBr2][BF4] congener 5 as a pale green, crystalline powder. The structure of 4 and 5 were determined by single-crystal X-ray diffraction, revealing for 5 a ?-N-coordination of the AuIII atom by the picolyl nitrogen atom. Further attempts to exchange all bromides by carboxylates results in the reduction to the dimeric AuI compound [(NHC)2Au2][BF4]2, 6.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Johannes Kepler Universität Linz

Journal

Zeitschrift für Anorganische und Allgemeine Chemie

Band

637

Seiten

2129-2134

Anzahl der Seiten

6

ISSN

0044-2313

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

105113 Kristallographie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/98d3a294-b46c-442c-a9e1-b68c8e3a4832