| Patent Number |
Title Of Patent |
Date Issued |
| 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. |
