US4716257A
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Organolanthanide catalysts
Assignee: Northwestern University
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Filing: 1987-05-14
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Granted: 1987-12-29
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Expires: 2007-05-14
Abstract
Abstract The reaction of the organolanthanide complexes [η 5 --(CH 3 ) 5 C 5 ] 2 MCl 2 - Li((C 2 H 5 ) 2 O) 2 + , M=La, Nd, Sm, Lu, with LiCH[Si(CH 3 ) 3 ] 2 provides a straight-forward route to ether-free and halide-free bis(pentamethylcyclopentadienyl) lanthanide alkyls, (η 5 (CH 3 ) 5 C 5 ) 2 MCH-[Si(CH 3 ) 3 ] 2 . The (η 5 (CH 3 ) 5 C 5 ) 2 NdCH[Si(CH 3 ) 3 ] 2 complexes react with H 2 under mild conditions to yield the corresponding hydrides [(η 5 (CH 3 ) 5 C 5 ) 2 MH] 2 . These complexes have been found to be extremely active homogeneous olefin polymerization catalysts, as well as catalysts for olefin and acetylene hydrogenation.
Inventors
- 👤 Tobin J. Marks
- 👤 Heiko Mauermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:50
CPC Classifications
C; C07; C07F; C07F17/00; B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2282; B01J31/2295; C07C; C07C5/00; C07C5/02; C07C5/03; C07F5/00; C07F7/00; C07F7/02; C07F7/025; C08; C08F; C08F10/00; B01J2231/00; B01J2231/10; B01J2231/12; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; B01J2531/00; B01J2531/30; B01J2531/37; B01J2531/38; C07C2531/00; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A method for hydrogenating olefins comprising the steps of (a) filling an evacuated reaction vessel with a measured volume of solvent; (b) preparing a substantially pure hydrogen atmosphere in said reaction vessel and over said solvent; (c) adding measured amounts of a catalyst and an olefin, said catalyst including a lanthanide complex of the formula (Cp 2 'MH) 2 , where Cp'=(η 5 (CH 3 ) 5 C 5 ) and M is selected from the group consisting of the Lanthanide Series elements; and (d) mixing; whereby said olefin is hydrogenated.
Claim 2
Independent Claim
91 words
A method for hydrogenating olefins comprising the steps of (a) filling an evacuated reaction vessel with a measured volume of solvent; (b) preparing a substantially pure hydrogen atmosphere in said reaction vessel and over said solvent; (c) adding measured amounts of a catalyst and an olefin, said catalyst including a lanthanide complex of the formula (Cp 2 'MH) 2 , where Cp'=(η 5 (CH 3 ) 5 C 5 ) and M is selected from the group consisting of the Lanthanide Series elements; and (d) mixing; whereby said olefin is hydrogenated.
Claim 3
Dependent Claim
18 words
The method of claim 1 further including the initial steps of preparing said reaction vessel to be moisture-free.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said solvent is selected from the group consisting of cyclohexane, toluene and tetrahydrofuran.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein M is selected from the group consisting of La, Nd, Sm and Lu.
Claim 6
Independent Claim
130 words
A method for hydrogenating olefins comprising the steps of: (a) evacuating a reaction vessel; (b) filling said evacuated reaction vessel with a measured quantity of a solvent; (c) degassing said solvent in said reaction vessel and backfilling with hydrogen; (d) allowing the temperature of said solvent to reach thermal equilibrium with the temperature of the hydrogen; (e) adding a measured volume of an olefin; (f) adding a measured volume of a catalytic solution to said reaction vessel to form a reaction mixture, said catalytic solution comprising a mixture of (Cp 2 'MH) 2 in a solvent, where Cp'=(η 5 (CH 3 ) 5 C 5 ) and M is selected from the group consisting of the Lanthanide Series elements; and (g) mixing said reaction mixture, whereby said olefin is hydrogenated.
Claim 7
Independent Claim
130 words
A method for hydrogenating olefins comprising the steps of: (a) evacuating a reaction vessel; (b) filling said evacuated reaction vessel with a measured quantity of a solvent; (c) degassing said solvent in said reaction vessel and backfilling with hydrogen; (d) allowing the temperature of said solvent to reach thermal equilibrium with the temperature of the hydrogen; (e) adding a measured volume of an olefin; (f) adding a measured volume of a catalytic solution to said reaction vessel to form a reaction mixture, said catalytic solution comprising a mixture of (Cp 2 'MH) 2 in a solvent, where Cp'=(η 5 (CH 3 ) 5 C 5 ) and M is selected from the group consisting of the Lanthanide Series elements; and (g) mixing said reaction mixture, whereby said olefin is hydrogenated.
Claim 8
Dependent Claim
19 words
The method of claim 5 wherein said solvent is selected from the group consisting of toluene, tetrahydrofuran and cyclohexene.
References Cited (Backward Citations)
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