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Steric control of the chromium-catalyzed oligomerization of ethylene

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons58516

Döhring,  Arno
Research Department Jolly, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons58645

Jensen,  Vidar R.
Research Department Thiel, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons135210

Jolly,  Peter W.
Research Department Jolly, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons59045

Thiel,  Walter
Research Department Thiel, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

Weber,  Jan C.
Research Department Jolly, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Döhring, A., Jensen, V. R., Jolly, P. W., Thiel, W., & Weber, J. C. (2001). Steric control of the chromium-catalyzed oligomerization of ethylene. Macromolecular Symposia, 173(1), 117-121. doi:10.1002/1521-3900(200108)173:1<117:AID-MASY117>3.0.CO;2-Y.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-5A9F-1
Abstract
Catalysts for the oligomerization and polymerization of ethylene have been obtained by activating phosphinoalkyl-substituted cyclopentadienyl chromium complexes, e.g. (η15-R2PC2H4C5H4)CrCl2, with methylalumoxane (MAO). DFT-calculations indicate that the observed dependence of the degree of oligomerization upon the size of the substituents (R) on the P-donor atom is a result of a steric influence on the stability of the transition state for the chain termination step.