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

Christian Klemps, Antoine Buchard, Romaric Houdard, Audrey Auffrant, Nicolas Mezailles, Xavier Frederic Le Goff, Louis Ricard, Lucien Saussine, Lionel Magna, Pascal Le Floch

Research output: Contribution to journalArticle

20 Citations (Scopus)

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([small mu ]-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.
Original languageEnglish
Pages (from-to)1748-1752
Number of pages5
JournalNew Journal of Chemistry
Volume33
Issue number8
Early online date16 Jun 2009
DOIs
Publication statusPublished - 2009

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Oligomerization
Methane
Chromium
Potassium
Catalyst activity
Ethylene
Salts
Crystal structure
Polymerization
X rays
Geometry
hexamethylsilazane
ethylene

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Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization. / Klemps, Christian; Buchard, Antoine; Houdard, Romaric; Auffrant, Audrey; Mezailles, Nicolas; Le Goff, Xavier Frederic; Ricard, Louis; Saussine, Lucien; Magna, Lionel; Le Floch, Pascal.

In: New Journal of Chemistry, Vol. 33, No. 8, 2009, p. 1748-1752.

Research output: Contribution to journalArticle

Klemps, C, Buchard, A, Houdard, R, Auffrant, A, Mezailles, N, Le Goff, XF, Ricard, L, Saussine, L, Magna, L & Le Floch, P 2009, 'Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization', New Journal of Chemistry, vol. 33, no. 8, pp. 1748-1752. https://doi.org/10.1039/B904619D
Klemps, Christian ; Buchard, Antoine ; Houdard, Romaric ; Auffrant, Audrey ; Mezailles, Nicolas ; Le Goff, Xavier Frederic ; Ricard, Louis ; Saussine, Lucien ; Magna, Lionel ; Le Floch, Pascal. / Chromium (iii)-bis(iminophosphoranyl)methanido complexes: synthesis, X-ray crystal structures and catalytic ethylene oligomerization. In: New Journal of Chemistry. 2009 ; Vol. 33, No. 8. pp. 1748-1752.
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AU - Klemps, Christian

AU - Buchard, Antoine

AU - Houdard, Romaric

AU - Auffrant, Audrey

AU - Mezailles, Nicolas

AU - Le Goff, Xavier Frederic

AU - Ricard, Louis

AU - Saussine, Lucien

AU - Magna, Lionel

AU - Le Floch, Pascal

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AB - 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([small mu ]-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.

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