Organolanthanide catalysts

Details Organolanthanide catalysts Organolanthanide catalysts

1985-03-25

1987-05-26

Terapane, John F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Rare earth containing

556 11, 502263, 502302, 502303, 502304, 502152, C07F 702, B01J 2106, B01J 3112

Patent

active

046687734

ABSTRACT:
The reaction of the organolanthanide complexes [.eta..sup.5 --(CH.sub.3).sub.5 C.sub.5 ].sub.2 MCl.sub.2.sup.- Li((C.sub.2 H.sub.5).sub.2 O).sub.2.sup.+, M=La, Nd, Sm, Lu, with LiCH[Si(CH.sub.3).sub.3 ].sub.2 provides a straight-forward route to ether-free and halide-free bis(pentamethylcyclopentadienyl) lanthanide alkyls, (.eta..sup.5 (CH.sub.3).sub.5 C.sub.5).sub.2 MCH--[Si(CH.sub.3).sub.3 ].sub.2. The (.eta..sup.5 (CH.sub.3).sub.5 C.sub.5).sub.2 NdCH[Si(CH.sub.3).sub.3 ].sub.2 complexes react with H.sub.2 under mild conditions to yield the corresponding hydrides [(.eta..sup.5 (CH.sub.3).sub.5 C.sub.5).sub.2 MH].sub.2. These complexes have been found to be extremely active homogeneous olefin polymerization catalysts, as well as catalysts for olefin and acetylene hydrogenation.

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Evans et al, Organolanthanide Hydride Chemistry, 3. Reactivity of Low-Valent Samarium with Unsaturated Hydrocarbons Leading to a Structurally Characterized Samarium Hydride Complex, JACS 1983, 105, 1401-1403.
Watson et al, Homogeneous Lanthanide Complexes as Polymerization and Oligomerization Catalysts: Mechanistic Studies, ACS Symposium Series, 1983, 212, 459-479.
Watson and Parshall, Organolanthanides in Catalysis, Acc. Chem. Res 1985, 18, 51-56.
Mauermann, Swepston and Marks, 5f.sup.3 vs. 4f.sup.3, Routes to and Properties of Highly Reactive Neodymium (III) Hydrocarbyl and Hydride Complexes, Organometallics, 4, 200, (1985).

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