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Richard R. Schrock Patents
Inventor:
Schrock; Richard R.
Address:
Winchester, MA
No. of patents:
21
Patents:












Patent Number Title Of Patent Date Issued
8222469 Catalysts and processes for the formation of terminal olefins by ethenolysis July 17, 2012
The present invention relates generally to catalysts and processes for the formation of terminal olefin(s) from internal olefin(s) via ethenolysis reactions. The ethenolysis reactions may proceed with high conversion, high turnover, and/or high selectivity.
7932397 Olefin metathesis catalysts and related methods April 26, 2011
The present invention provides methods for the synthesis of catalysts and precursors thereof. Methods of the invention may comprise combining a catalyst precursor and at least one ligand to generate a catalytically active species, often under mild conditions and in high yields. In some
7135544 Living olefin polymerization processes November 14, 2006
Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the met
6855839 Method of polymerization February 15, 2005
This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula: ##STR1##wherein M is a gr
6610806 Living olefin polymerization processes August 26, 2003
Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the met
6346652 Asymmetric ring-closing metathesis reactions involving achiral and meso substrates February 12, 2002
A composition and method for the catalytic conversion of a racemic mixture of dienes to a cyclic olefin by a ring-closing metathesis (RCM) reaction are disclosed. The composition, a transition metal complex with an M.dbd.C reaction site, contains a bidentate dialkoxide of at least 80% op
6316555 Living olefin polymerization processes November 13, 2001
Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the met
6271325 Method of polymerization August 7, 2001
This invention relates to a composition of matter represented by the formula below, and to a polymerization process comprising combining an olefin in the gas or slurry phase with an activator, a support and a compound represented by the following formula: ##STR1##whereinM is a group
6121473 Asymmetric ring-closing metathesis reactions September 19, 2000
A composition and method for the catalytic conversion of a racemic mixture of dienes to a cyclic olefin by a ring-closing metathesis (RCM) reaction are disclosed. The composition, a transition metal complex with an M.dbd.C reaction site, contains a bidentate dialkoxide of at least 80% op
5889128 Living olefin polymerization processes March 30, 1999
Processes for the living polymerization of olefin monomers with terminal carbon-carbon double bonds are disclosed. The processes employ initiators that include a metal atom and a ligand having two group 15 atoms and a group 16 atom or three group 15 atoms. The ligand is bonded to the met
5146033 Homogeneous rhenium catalysts for metathesis of olefins September 8, 1992
The invention pertains to rhenium (VII) compounds which are catalysts for metathesis of ordinary olefins (hydrocarbons) and functionalized olefins in a homogeneous phase and to methods of synthesizing these compounds. The rhenium compounds comprise a rhenium (VII) atom centrally linked t
5142073 Synthesis of molybdenum and tungsten complexes August 25, 1992
Molybdenum and tungsten complexes useful as precursors for catalysts useful in the metathesis of olefins are disclosed. New compounds have the formula: M(R.sub.1).sub.2 (NR.sub.2).sub.2 (R.sub.3).sub.x.
5087710 Homogeneous rhenium catalysts for metathesis of olefins February 11, 1992
The invention pertains to rhenium (VII) compounds which are catalysts for metathesis of ordinary olefins (hydrocarbons) and functionalized olefins in a homogeneous phase and to methods of synthesizing these compounds. The rhenium compounds comprise a rhenium (VII) atom centrally linked t
4772734 Tantalum catalysts for the dimerization of olefins September 20, 1988
1-Butenes are selectively produced via the dimerization of 1-olefins in the presence of novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C.sub.5 H.sub.5-x (SiR.sup.6.sub.3).sub.x, wherein each R.sup.6 may be the same or
4727215 Catalyst composition for effecting metathesis of olefins February 23, 1988
Compounds of the formula:whereinM is molybdenum or tungsten;R.sup.1 and R.sup.2 are alkyl, aryl, aralkyl or halogen-substituted derivatives or silicon-containing analogs thereof;R.sup.3 is an alkyl, aryl, aralkyl or any substituent that results from the initial reaction between the M.dbd.CHR
4717783 Tantalum catalysts for the dimerization of olefins January 5, 1988
1-Butenes are selectively produced via the dimerization of 1-olefins in the presence of novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C.sub.5 H.sub.5-x (SiR.sup.6.sub.3).sub.x, wherein each R.sup.6 may be the same or
4681956 Catalyst composition for effecting metathesis of olefins July 21, 1987
Compounds of the formula:whereinM is molybdenum or tungsten;R.sup.1 and R.sup.2 are alkyl, aryl, aralkyl or halogen-substituted derivatives or silicon-containing analogs thereof;R.sup.3 is an alkyl, aryl, aralkyl or any substituent that results from the initial reaction between the M.dbd.CHR
4427595 Catalyst composition to effect metathesis of acetylenes January 24, 1984
Tungsten compounds of the formula:whereinR.sup.3 is an alkyl or aryl;L is a moiety of the formula ZR.sup.4 R.sup.5 R.sup.6, (O)ZR.sup.4 R.sup.5 R.sup.6, ZR.sup.4 R.sup.5 (OR.sup.6), ZR.sup.4 (OR.sup.5) (OR.sup.6) or Z(OR.sup.4) (OR.sup.5) (OR.sup.6); wherein Z is a group 5 element includ
4245131 Dimerization of olefins using tantalum and niobium catalysts January 13, 1981
Tantalum and niobium catalysts or catalyst precursors of the formula: ##STR1## wherein R is cyclopentadienyl, which can be substituted with methyl up to five positions, or neopentylidene, R.sup.1 is neopentyl or benzyl, n is 0 or 1, R.sup.2 is neopentylidene, benzylidene, tetramethyl
4231947 Tantalum and niobium catalysts or catalyst precursors November 4, 1980
Tantalum and niobium catalysts or catalyst precursors of the formula: ##STR1## wherein R is cyclopentadienyl, which can be substituted with methyl up to five positions, or neopentylidene, R.sup.1 is neopentyl or benzyl, n is 0 or 1, R.sup.2 is neopentylidene, benzylidene, tetramethyl
4197419 Tantalum catalysts or catalyst precursors April 8, 1980
Tantalum catalysts or catalyst precursors of the formula ##STR1## wherein X is a halide, or alkoxide and L is an alkene (CH.sub.2 .dbd.CHR) having from 2 to 20 carbon atoms, react with 1-olefins to give catalysts of the formula ##STR2## wherein R.sup.2 is hydrogen or a C.sub.










 
 
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