Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9614855 | Journal of Molecular Catalysis A: Chemical | 2005 | 7 Pages |
Abstract
Various 3,5-substituted tris(pyrazolyl)borate nickel(II) and palladium(II) complexes have been prepared and characterised in both the solid state and solution [tris(pyrazolyl)borate = tris(3,5-dimethylpyrazolyl)borate (Tp*), tris(3-t-butyl-5-methylpyrazolyl)borate (Tpt-Bu,Me) or tris(3-cumyl-5-methyl pyrazolyl)borate (TpCum,Me)]. The crystal structures of the tetrahedral complex [k3N,Nâ²,Nâ³-Tpt-Bu,MeNiCl] and of the trigonal-bipyramidal derivative [k3N,Nâ²,Nâ³-TpCum,MeNiCl(3-methyl-5-cumylpyrazole)] have been determined by X-ray diffraction analysis. The catalytic performance of all compounds has been tested in ethylene polymerisation. The nickel catalysts activated with methylaluminoxane (MAO) produce polyethylene with moderate to good activity, while the palladium compounds show scarce activity.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Roberto Santi, Anna Maria Romano, Anna Sommazzi, Manuela Grande, Claudio Bianchini, Giuseppe Mantovani,