PCNCP ligands in the chromium-catalyzed oligomerization of ethylene: tri- versus tetramerization.
Chromium(III) complexes bearing R'N(CH2PR2)2 (PCNCP) ligands have been prepared. Upon activation with methylaluminoxane, these complexes proved to be effective in the selective tri- and tetramerization of ethylene. The formation of either 1-hexene or 1-octene was found to be highly dependent on the steric bulk of the substituents R on the phosphine moieties. This observation was rationalized by using density functional theory calculations on selected steps of the metallacyclic mechanism of the ethylene oligomerization reaction.
Klemps
Christian
C
Laboratoire Hétéroéléments et Coordination, Ecole Polytechnique-CNRS, 91128 Palaiseau cedex, France.
Payet
Elina
E
Magna
Lionel
L
Saussine
Lucien
L
Le Goff
Xavier F
XF
Le Floch
Pascal
P