Styrene-divinylbenzene resins were used for the synthesis of different polymer-bound beta-diketones, obtained by anchoring the chelating group through either the central or the lateral position. The heterogenized diketone ligand was subsequently reacted with Ni(COD)(2) analogously to hb the corresponding homogeneous catalysts active in alpha-olefin oligomerization. The heterogenized catalysts showed a good activity only when the central position of the chelate moiety was free. Heterogenization caused a significant change of selectivity: olefin oligomerization was accompanied by the formation of a large amount of in terms of steric effects caused by the bulky polymeric ligand. (C) 1998 John Wiley & Sons, Ltd.
|Autori:||Benvenuti F; Carlini C; Raspolli Galletti A; Sbrana G; Marchionna M; Ferrarini P|
|Titolo:||Novel polymer-supported beta-diketonate nickel catalysts for alpha-olefin activation|
|Anno del prodotto:||1998|
|Digital Object Identifier (DOI):||10.1002/(SICI)1099-1581(199802)9:2<113::AID-PAT723>3.3.CO;2-B|
|Appare nelle tipologie:||1.1 Articolo in rivista|