Normal and abnormal carbene complexes derived from thiazole: Preparation and a preliminary investigation of their relative catalytic performance
- Stander-Grobler, Elzet Department of Chemistry and Polymer Science, University of Stellenbosch, South Africa
- Schuster, Oliver Department of Chemistry and Polymer Science, University of Stellenbosch, South Africa - Department of Chemistry, University of Fribourg, Switzerland
- Strasser, Christoph E. Department of Chemistry and Polymer Science, University of Stellenbosch, South Africa
- Albrecht, Martin Department of Chemistry, University of Fribourg, Switzerland
- Cronje, Stephanie Department of Chemistry and Polymer Science, University of Stellenbosch, South Africa - Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt, Germany
- Raubenheimer, Helgard G. Department of Chemistry and Polymer Science, University of Stellenbosch, South Africa
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28.08.2011
Published in:
- Polyhedron. - 2011, vol. 30, no. 17, p. 2776-2782
NHC
Remote azolylidene
Group 10
Azolylidene
Palladium
Nickel
Five-membered heterocycle
Carbene complex
English
Readily prepared 2-, 4- and 5-bromo-3-methyl thiazolium triflates react by oxidative substitution with M(PPh₃)₄ (M = Ni or Pd) to furnish five of the expected normal and abnormal cationic thiazolylidene complexes (1a, 1b, 2a, 2b, and 3b). Carbene complex formation is accompanied by a ca. 40 ppm downfield shift of the α-N carbene carbons in Pd complexes 1 and 2 in their ¹³C NMR spectra but the chemical shift of C(carbene) in the abnormal3b (δ 135.7) is particularly low. Crystal and molecular structures of complexes 1a, 2b, and 3b all indicate a square planar arrangement of the ligands around the central metal atoms. The new complexes catalyse Suzuki–Miyaura aryl coupling.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 27934
- DOI 10.1016/j.poly.2011.07.028
- Persistent URL
- https://folia.unifr.ch/unifr/documents/302291
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