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Issue 8, 2009
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Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalyticethylene oligomerization

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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

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Publication details

The article was received on 06 Mar 2009, accepted on 18 May 2009 and first published on 17 Jun 2009


Article type: Paper
DOI: 10.1039/B904619D
New J. Chem., 2009,33, 1748-1752

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    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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