Issue 8, 2009

Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalyticethylene oligomerization

Abstract

Bis(aminophoshonium) salts derived from bis(diphenylphosphino)methane were prepared and triply deprotonated with potassium hexamethyldisilazane to yield the corresponding bis(iminophosphoranyl)methanides, which were then subjected to coordination with CrIIICl3(THF)3. Binuclear complexes of type [(HC(PPh2NR)2Cr(μ-Cl)(Cl))2] (R = iPr, tBu) with an octahedral coordination geometry and a long C–Cr bond were obtained and structurally characterized. In the case of R = o-MeO-C6H4, a monomeric species featuring no C–Cr bond is observed. Preliminary evaluation of catalytic activities of these complexes in ethylene oligomerization and polymerization is reported.

Graphical abstract: Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization

Supplementary files

Article information

Article type
Paper
Submitted
06 Mar 2009
Accepted
18 May 2009
First published
17 Jun 2009

New J. Chem., 2009,33, 1748-1752

Chromium (III)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization

C. Klemps, A. Buchard, R. Houdard, A. Auffrant, N. Mézailles, X. F. Le Goff, L. Ricard, L. Saussine, L. Magna and P. Le Floch, New J. Chem., 2009, 33, 1748 DOI: 10.1039/B904619D

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