Journal article

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
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
  • English
Classification
Chemistry
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302291
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