Abstract: The present invention relates to catalyst systems, processes for making such catalysts, intermediates for such catalysts, and olefin polymerization processes using such catalysts wherein such catalyst includes a component represented by the following formula IA: wherein R and R′ independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl or organosilyl radical; R1, R2, and R3 independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl radical; M is a group IIIB, IVB, VB, VIB, VIIB or VIII transition metal; T independently represents a univalent anionic ligand such as a hydrogen atom, or a substituted or unsubstituted hydrocarbyl, halogeno, aryloxido, arylorganosilyl, alkylorganosilyl, amido, arylamido, phosphido, or arylphosphido group, or two T groups taken together represent an alkylidene or a cyclometallated hydrocarbyl bidentate ligand; L independently represents a sigma donor

Abstract: The present invention relates to catalyst systems, processes for making such catalysts, intermediates for such catalysts, and olefin polymerization processes using such catalysts wherein such catalyst includes a component represented by the following formula IA: 1

Abstract: The present invention relates to catalyst systems, processes for making such catalysts, intermediates for such catalysts, and olefin polymerization processes using such catalysts wherein such catalyst includes a component represented by the following formula 1A: wherein R and R′ independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl or organosilyl radical; R1, R2, and R3 independently represent a hydrogen atom, or a substituted or unsubstituted, branched or unbranched hydrocarbyl radical; M is a group IIIB, IVB, VB, VIB, VIIB or VIII transition metal; T independently represents a univalent anionic ligand such as a hydrogen atom, or a substituted or unsubstituted hydrocarbyl halogeno, aryloxido, arylorganosilyl, alkyloriganosilyl, amido, arylamido, phosphido, or arylphosphido group, or two T groups taken together represent an alkylidene or a cyclometallated hydrocarbyl bidentate ligand; L independently represents a sigma donor

Abstract: Fluoroaryl Grignard reagents are produced from a hydrocarbyl Grignard reagent and fluoroaromatic compounds via separate additions of different fluoroaromatic compounds, such that the conversion of hydrocarbyl Grignard reagent to the desired fluoroaryl Grignard reagent is essentially complete, and thus the reaction product is free or essentially free of agents that may negatively affect subsequent reactions. The fluoroaryl Grignard reagents may be further reacted with boron trihalides in order to obtain tris(fluoroaryl)boranes or tetrakis(fluoroaryl)borates.

Abstract: Perfluoroaryl Grignard reagents are produced from a hydrocarbyl Grignard reagent and polyhaloaromatic compounds via separate additions of different polyhaloaromatic compounds, such that the conversion of hydrocarbyl Grignard reagent to the desired perfluoroaryl Grignard reagent is essentially complete, and thus the reaction product is free or essentially free of agents that may negatively affect subsequent reactions. The perfluoroaryl Grignard reagents may be further reacted with boron trihalides in order to obtain tris(perfluoroaryl)boranes or tetrakis(perfluoroaryl)borates.

Abstract: One aspect of the invention is a process for purifying a pentafluorophenyl boron compound from a crude mixture comprised of the pentafluorophenyl boron compound and impurities, the impurities at least comprised of an ether and water, the process comprising: (a) mixing the crude mixture with an azeotropic organic solvent which (i) is capable of azeotrope formation with the water and (ii) has a boiling point above the boiling point of the ether; (b) distilling the resulting solution to remove at least a portion of the impurities; and (c) cooling the distilled solution so that a precipitate comprised of the pentafluorophenyl boron compound is formed. Processes are also described for producing pentafluorophenyl boron compounds which are particularly pure, dry and fine.

Abstract: A metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal are produced from a crude impure pasty or non-wet mixture containing at least 50% by weight of a metallocene having two halogen atoms bonded to a Group 4 metal atom, by (a) mixing liquid aromatic hydrocarbon with the crude impure pasty or non-wet mixture; (b) mixing a solution of an organolithium compound in a suitable anhydrous ether or paraffinic hydrocarbon solvent or a mixture thereof, with the mixture from (a) and agitating the resulting mixture so that lithium halide solids are formed; and (c) separating the solids and recovering the resultant liquid portion which is mainly a solution of the metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal. Additional optional steps include (d) replacing the original solvent from the solution from (c) with a liquid paraffinic hydrocarbon diluent to form a slurry of product solids; and (e) recovering the product metallocene solids.

Abstract: Chiral metallocenes are prepared by reacting a salt of an asymmetric bis(cyclopentadienyl) moiety containing ligand with a chelate diamine adduct of a transition, lanthanide, or actinide metal halide in an organic solvent medium so as to produce said chiral metallocene.

Abstract: A mixture is made from (i) a tris(dihydrocarbylamino) phosphoroamidite and/or a hydrohalide thereof, (ii) a strong base (e.g., NaOH) in proportions of about 2.0 to about 4.0 moles of (ii) per mole of (i), and (iii) at least one solvent for the base (e.g., H.sub.2 O). To this mixture is added a hydrocarbyl monohalide (e.g., EtBr) in proportions of about 1.0 to about 3.0 moles per mole of phosphoroamidite used in forming the initial mixture, and the resultant reaction produces tetrakis(dihydrocarbylamino)phosphonium halide. The process enables more efficient production of tetrakis(dihydrocarbylamino)phosphonium halides, and is capable of being effectively used in large scale production facilities while satisfying the economic constraints of commercial operations.

Abstract: Chiral metallocenes are prepared by reacting a salt of an asymmetric bis(cyclopentadienyl)-moiety-containing ligand with a chelate diamine adduct of a transition, lanthanide, or actinide metal halide in an organic solvent or diluent so as to produce said chiral metallocene.

Abstract: Metallocenes, such as silicon bridged ansa-metallocenes, are purified by heating a slurry of the metallocene at elevated temperature in an aprotic, polar solvent so as to extract impurities from the metallocene into the solvent and then separating the impurity containing solvent from the metallocene.

Abstract: Chiral metallocenes are prepared by reacting a salt of an asymmetric bis(cyclopentadienyl) moiety containing ligand with a chelate diamine adduct of a transition, lanthanide, or actinide metal halide in an organic solvent medium so as to produce said chiral metallocene.

Abstract: Metallocenes which are useful as olefin polymerization catalysts are prepared by reacting a compound of a metal of the group 4 to 10, lanthanide or actinide series of the Periodic Table of the Elements with a magnesium halide salt of a cyclopentadienyl containing ligand in the presence of an organic halide so as to form the metallocene while simultaneously raising the oxidation state of the metal.

Abstract: Cyclopentadienyl derivatives are deprotonated by a process whereby the cyclopentadienyl derivatives are reacted with a Grignard reagent in an inert solvent which contains from about 0.5 to 1.5 equivalents per equivalent of cyclopentadienyl derivative of a cyclic ether or an acyclic polyether, so as to form a dianionic salt of said cyclopentadienyl derivative.

Abstract: A racemic mixture of a chiral, silicon bridged transition metal metallocene, which is substantially free of meso isomer, is precipitated directly from a reaction mixture as it is formed by reacting an organic solvent solution of an alkali metal salt of a silicon bridged ligand with a transition metal tetrahalide-ether complex.

Abstract: The process for preparing a compound of the formula:Cp'YNHRwherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C.sub.1 to C.sub.20 hydrocarbyl or substituted hydrocarbyl group, the process comprising reacting a ligand of the formula Cp'YX, wherein Cp' and Y are as defined above and X is halogen, with a substantially equimolar amount of a primary amine of the formula NH.sub.2 R, wherein R is as defined above, in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35.degree. C., so as to form said compound.

Abstract: A safety circuit for a marine signal device adapted to be fired after being dropped into sea water. The device has a casing which will allow the water to enter when ready for firing. A salt water battery, a water pressure operated switch and an electric blasting cap are all connected in series within the casing. A resistor of selected value is connected across the terminals of the battery so that the battery will be discharged in a predetermined time if the blasting cap fails to be detonated by the action of water pressure on the switch at a predetermined depth. Furthermore, a shunt is provided between the leads of the blasting cap to reduce the hazards during handling due to static charges or radio frequencies. The shunt may be manually removed prior to firing or in one embodiment the pressure operated switch automatically disconnects the shunt when the switch is operated by water pressure.