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A New Class of Modular Oxazoline-NHC Ligands and Their Coordination Chemistry with Platinum Metals

  1. Nathanaëlle Schneider1,
  2. Stéphane Bellemin-Laponnaz2,
  3. Hubert Wadepohl1,
  4. Lutz H. Gade1

Article first published online: 14 NOV 2008

DOI: 10.1002/ejic.200800908

Issue

European Journal of Inorganic Chemistry

European Journal of Inorganic Chemistry

Volume 2008, Issue 36, pages 5587–5598, December 2008

Additional Information

How to Cite

Schneider, N., Bellemin-Laponnaz, S., Wadepohl, H. and Gade, L. H. (2008), A New Class of Modular Oxazoline-NHC Ligands and Their Coordination Chemistry with Platinum Metals. Eur. J. Inorg. Chem., 2008: 5587–5598. doi: 10.1002/ejic.200800908

Author Information

  1. 1

    Anorganisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany

  2. 2

    Institut de Chimie, CNRS – Université Louis Pasteur, 1, rue Blaise Pascal, 67000 Strasbourg, France

Publication History

  1. Issue published online: 9 DEC 2008
  2. Article first published online: 14 NOV 2008
  3. Manuscript Received: 10 SEP 2008

Funded by

  • Deutsche Forschungsgemeinschaft (DFG). Grant Number: SFB 623
  • Deutsch-Französische Hochschule (DFH-UFA)

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Keywords:

  • Carbenes;
  • Oxazolines;
  • Platinum;
  • Rhodium

Abstract

A novel family of enantiomerically pure imidazolium salts [(NHC-Ox)H]+X– (2a–g) has been generated bearing an oxazoline unit and in which both heterocycles are connected by a (dimethyl)methylene bridge. Deprotonation of the imidazolium salt 2f and subsequent reaction of the resulting free carbene with [Rh(nbd)Cl]2 (nbd = norbornadiene) afforded the neutral rhodium(I) complex [(NHC-Ox)Rh(nbd)Br] (3) in which the ligand was found to be monodentate. Bromide abstraction lead to the air-stable cationic complex [(NHC-Ox)Rh(nbd)]PF6 (4) with the expected bidentate coordination mode of the ligand. Reaction of the imidazolium salt 2d with Karstedt's catalyst and one equivalent of KOtBu gave the trigonal planar platinum(0) complex [(NHC-Ox)Pt(dvtms)] (5) (dvtms = divinyltetramethylsiloxane), which was oxidized by CsBr3 to give the square planar platinum(II) complex [(NHC-Ox)PtBr2] (6). Complex [(NHC-Ox)PtCl2] (7) was directly prepared by reaction of the imidazolium salt with Ag2O followed by the addition of [PtCl2(1,5-cod)]. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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