Novel polymer-supported β-diketonate nickel catalysts for α-olefin activation

✍ Scribed by Federica Benvenuti; Carlo Carlini; Anna Maria Raspolli Galletti; Glauco Sbrana; Mario Marchionna; Paolo Ferrarini

• Book ID: 101290874
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 131 KB
• Volume: 9
• Category: Article
• ISSN: 1042-7147
• DOI: 10.1002/(sici)1099-1581(199802)9:2<113::aid-pat723>3.0.co;2-k

✦ Synopsis

Styrene-divinylbenzene resins were used for the synthesis of different polymer-bound ␤-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 the corresponding homogeneous catalysts active in ␣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 polymeric products. This behavior is discussed in terms of steric effects caused by the bulky polymeric ligand.