Abstract:
Provided is a solid-supported ruthenium complex represented by general formula (1), (2) or (3). Further provided are: a method for manufacturing a reduction product by reducing an organic compound in the presence of the solid-supported ruthenium complex and a hydrogen donor; a method for manufacturing an optically active alcohol, characterized by reducing a carbonyl group in a carbonyl compound in the presence of the solid-supported ruthenium complex and a hydrogen donor; and a method for manufacturing an optically active amine, characterized by reducing an imino group of an imine compound in the presence of the solid-supported ruthenium complex and a hydrogen donor.
Abstract:
A phosphorus ligand-free, mild, efficient and complete catalytic hydrogenation process is for the sustainable production of terminal diols from renewable terminal dialkyl esters with improved yield. Soluble, phosphorus ligand free Ru (II)-pincer type complexes can be used as catalysts in the hydrogenation process.
Abstract:
A method for the methylation of amines, amides and imines comprises the step of reacting these compounds with CO2 and H2 in the presence of a Ruthenium-phosphine complex.
Abstract:
Provided are ligand compounds containing two or more diphosphinoamine functional groups, where the two or more diphosphinoamine functional groups are linked by 4 carbon atoms, a catalyst system including the ligand compounds for olefin oligomerization, and a method for olefin oligomerization using the same. The catalyst system for olefin oligomerization according to the present invention has excellent catalytic activity, and yet, exhibits high selectivity to 1-hexene and 1-octene, thus enabling efficient preparation of alpha-olefin.
Abstract:
A system is provided that substantially increases the efficiency of CO2 capture and removal by positioning a catalyst within an optimal distance from the air-liquid interface. The catalyst is positioned within the layer determined to be the highest concentration of carbon dioxide. A hydrophobic tether is attached to the catalyst and the hydrophobic tether modulates the position of the catalyst within the liquid layer containing the highest concentration of carbon dioxide.
Abstract:
The present invention relates to a catalyst composition comprising: (a) a binuclear chromium(II) complex; (b) a ligand of the general structure (A) R1R2P—N(R3)—P(R4)—N(R5)—H or (B) R1R2P—N(R3)—P(R4)—N(R5)—PR6R7, wherein R1, R2, R3, R4, R5, R6 and R7 are independently selected from halogen, amino, trimethylsilyl, C1-C10-alkyl, aryl and substituted aryl, wherein the PNPN- or PNPNP-unit is optionally part of a ring system; and (c) an activator or co-catalyst, as well as to a process for oligomerization of ethylene.
Abstract translation:本发明涉及一种催化剂组合物,其包含:(a)双核铬(II)络合物; (R)R(R)-N(R 5)-H或(B)R 1 R 2 P -N(R 3)-P(R 4)-N(R 5) -PR 6 R 7,其中R 1,R 2,R 3,R 4,R 5,R 6和R 7独立地选自卤素,氨基,三甲基甲硅烷基,C 1 -C 10 - 烷基,芳基和取代的芳基,其中PNPN-或PNPNP-单元任选地是 环系; 和(c)活化剂或助催化剂,以及乙烯低聚方法。
Abstract:
Disclosed are metal-bound tetracarbene catalysts, such as iron based aziridination catalyst, having the formula: wherein X is a group 6, 7, 8, 9, or 10 metal and wherein Z is a hydrogen, alkyl, aryl or organic group, wherein the alkyl, aryl or organic group is optionally are independently substituted. In a specific example, a metal-bound tetracarbene catalyst has the formula: Also disclosed are methods of making (synthesizing), transmetallation reagents, these agents, metal-bound tetracarbene catalysts, and a method of catalytic alkene aziridination, using the disclosed metal-bound tetracarbene catalysts.
Abstract:
This invention relates to a transition metal catalyst compound represented by the formula: LMX2 or (LMX2)2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9, or 10 metal; each L is, independently, a tridentate or tetradentate neutrally charged ligand that is bonded to M by three or four nitrogen atoms, (where at least one of the nitrogen atoms is a central nitrogen atom and at least two of the nitrogen atoms are terminal nitrogen atoms), and at least two terminal nitrogen atoms are substituted with one C3-C50 hydrocarbyl and one hydrogen atom or two hydrocarbyls wherein at least one hydrocarbyl is a C3-C50 hydrocarbyl, and the central nitrogen atom is bonded to three different carbon atoms or two different carbon atoms and one hydrogen atom; X is independently a monoanionic ligand, or two X may join together to form a bidentate dianionic ligand.
Abstract:
Catalytic systems and methods for oxidizing materials in the presence of metal catalysts (preferably manganese-containing catalysts) complexed with selected macropolycyclic rigid ligands, preferably cross-bridged macropolycyclic ligands. Included are using these metal catalysts in such processes as: synthetic organic oxidation reactions such as oxidation of organic functional groups, hydrocarbons, and heteroatoms, including enantiomeric epoxidation of alkenes, enynes, sulfides to sulfones and the like; oxidation of oxidizable compounds (e.g., stains) on surfaces such as fabrics, dishes, countertops, dentures and the like; oxidation of oxidizable compounds in solution, dye transfer inhibition in the laundering of fabrics; and further in the bleaching of pulp and paper products.