Table of Contents
ISRN Inorganic Chemistry
Volume 2013 (2013), Article ID 732629, 13 pages
http://dx.doi.org/10.1155/2013/732629
Research Article

Influence of the Steric Demand of Coligands on the Catalytic Activity of Nickel(II) Complexes in the Copolymerization of Ethene and Carbon Monoxide

1Lehrstuhl I: Bioanorganische Chemie und Katalyse, Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
2Lehrstuhl II: Material- und Strukturforschung, Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany

Received 31 August 2012; Accepted 20 September 2012

Academic Editors: M. Joshaghani and A. J. Pardey

Copyright © 2013 Monika M. Lindner et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The copolymerization of ethene and carbon monoxide can be catalyzed with square planar arenidotriphenylphosphane nickel(II) complexes containing an N,O-chelate ligand. To examine the influence of the phosphorus ligand on the catalytic activity, five new nickel(II) complexes with P-ligands of different basicities and different steric demands were synthesized and fully characterized including the determination of the crystal structures of three of the complexes. The investigation of the catalytic activity of the new compounds showed a decisive influence of the steric properties of the P-ligand. A minimum steric demand is essential to ensure catalytic activity.