84099-45-6Relevant academic research and scientific papers
A new nickel complex for the oligomerization of ethylene
Peuckert, Marcell,Keim, Wilhelm
, p. 594 - 597 (1983)
We report the synthesis of (η3-C8H13)((C6H 5)2PCH2COO)Ni (1), which proved to be an excellent one-component model catalyst for the oligomerization of ethylene as practiced in Shell's higher olefin process (SHOP). In toluene solution this complex exists in two isomeric forms, the C8H13 ligand being 60% 4-enyl and 40% η3-allyl. Under reaction conditions (75°C, 10-80 bar, ethylene in toluene) 1 catalyzed the highly selective oligomerization of ethylene to linear (99+%), α olefins (93-99%) at activities of 0.6 mol of ethylene/mol of Ni/s. The chain growth factor K ranges from 0.67 to 0.77 depending on reaction conditions. Kinetic activation parameters and reaction constants could be determined (Ea = 71 kJ mol-1; S? = -49 J mol-1 K-1; kinsert/348K = 0.81 s-1).
