1. Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization
- Author
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Lucien Saussine, Audrey Auffrant, Romaric Houdard, Pascal Le Floch, Antoine Buchard, Xavier F. Le Goff, Christian Klemps, Nicolas Mézailles, Lionel Magna, Louis Ricard, Laboratoire Hétéroéléments et Coordination (DCPH), École polytechnique (X)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and IFP Energies nouvelles (IFPEN)
- Subjects
Ethylene ,010405 organic chemistry ,chemistry.chemical_element ,[CHIM.CATA]Chemical Sciences/Catalysis ,General Chemistry ,Crystal structure ,010402 general chemistry ,Photochemistry ,01 natural sciences ,Medicinal chemistry ,Catalysis ,0104 chemical sciences ,chemistry.chemical_compound ,Chromium ,Deprotonation ,Monomer ,chemistry ,Polymerization ,Materials Chemistry ,[CHIM.COOR]Chemical Sciences/Coordination chemistry ,Coordination geometry - Abstract
International audience; 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(-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.
- Published
- 2009
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