摘要:
A method for the methylation of amines, amides and imines comprises the step of reacting these compounds with CO 2 and H 2 in the presence of a Ruthenium-phosphine complex.
摘要:
The invention relates to a catalyst system for the polymerization of olefins comprising a metal complex of formula CyLMD and an activating cocatalyst, wherein M is titanium, Cy is a cyclopentadienyl-type ligand, D is a diene, L is a guanidinate-containing ligand of the formula (I) wherein each A is independently selected from nitrogen or phosphorous and R, R 1 , R 2 and R 3 are independently selected from the group consisting of hydrogen, hydrocarbyl, silyl and germyl residues, substituted or not with one or more halogen, amido, phosphido, alkoxy, or aryloxy radicals, and Cy is a mono- or polysubstituted cyclopentadienyl-type ligand, wherein the one or more substituents of Cy are selected from the group consisting of halogen, hydrocarbyl, silyl and germyl residues, optionally substituted with one or more halogen, amido, phosphido, alkoxy, or aryloxy residues. The invention further relates to a process for the preparation of a polymer comprising at least one aliphatic or aromatic hydrocarbyl C 2-20 olefin wherein the at least one aliphatic or aromatic olefin is contacted with the catalyst system of the present invention.
摘要:
The present invention relates to a low molecular weight optionally hydrogenated nitrile rubber and a process for preparing a low molecular weight optionally hydrogenated nitrile rubber by molecular weight degradation of nitrile rubbers via a metathesis process in the presence of a transition metal complex catalyst in a specific reaction mixture, a polymer composite comprising at least one optionally hydrogenated nitrile rubber, at least one cross-linking agent and/or curing system, optionally at least one filler and optionally further auxiliary products for rubbers and a shaped article comprising the optionally hydrogenated nitrile rubber or the composite.
摘要:
The present invention relates to a catalyst composition that includes a triphenylphosphine ligand, a monodentate phosphine ligand, a monodentate phosphine oxide ligand, and a transition metal catalyst, and a hydroformylation process using the same. In the hydroformylation process using the catalyst composition according to the present invention, the high catalytic activity can be obtained, and the selectivity (N/I selectivity) in respects to normal- or iso-aldehyde can be desirably controlled.
摘要:
Die Erfindung betrifft ein Verfahren zur Hydrosilylierung in Gegenwart eines Ruthenium-Katalysators, dadurch gekennzeichnet, dass der Ruthenium-Katalysator mindestens zwei unabhängige Kohlenstoff-π-gebundene Liganden aufweist, wobei mindestens einer dieser Liganden ausgewählt wird aus der Gruppe enthaltend η 6 -gebundene Arenliganden, η 6 -gebundene Trienliganden, η 4 -gebundene 1,5-Cyclooctadienliganden und η 4 -gebundene 1,3,5-Cyclooctatrienliganden, die Verwendung solcher Ruthenium- Verbindungen als Hydrosilylierungskatalysatoren und Zusammensetzungen enthaltend solche Ruthenium-Verbindungen.
摘要:
The present invention relates to functionalized catalyst supports that are useful in the formation of supported polymerization catalysts, supported catalysts derived from such functionalized catalyst supports, and pjolymerization processes utilizing such supported catalysts. The functionalized catalyst supports comprise a particulated, solid support material having chemically bonded thereto a plurality of conjugated or non-conjugated diene or alkyne functionalized ligand groups, said composition being capable of reacting with and tethering a catalytically activatable Group 3-10 or Lanthanide metal complex thereto.
摘要:
A Pd(OAc) 2 /diazabutadiene system has been developed for the catalytic cross-coupling of aryl halides with arylboronic acids. A combination of the diazabutadiene DAB-Cy (1, N, N'-Dicyclohexyl-1,4-dizabutadiene) and Pd(OAc) 2 was found to form an excellent catalyst for the Suzuki-Miyaura cross-coupling of various aryl bromides and activated aryl chlorides with arylboronic acids.
摘要:
The cationic iridium carbene complexes [Ir(cod)(N)(L)]X have been synthesized by reaction of [Ir(cod)(py)2]PF6 with L or NL ligands. Complexes of this type are active hydrogenation catalysts capable of hydrogenating simple olefins at room temperature and atmospheric pressure of hydrogen or by transfer hydrogenation