摘要:
The invention relates to a ligand that may be used to create a catalyst including a coordination complex is formed by the addition of two metals; Cp, Cp* or an unsubstituted or substituted pi-arene; and two coordinating solvent species or solvent molecules. The bimetallic catalyst may be used in the hydrogenation of C02 to form formic acid and/or salts thereof, and in the dehydrogenation of formic acid and/or salts thereof to form H2 and C02.
摘要:
Catalytic system comprising a) at least one N-alkylated imidazole and b) optionally at least one compound of at least one metal, and its use in the hydrochlorination reaction of acetylene with hydrogen chloride.
摘要:
A low cost, viable and modular method to prepare new, highly selective "catalytic membranes" and their use in various types of reactors is described. The membranes are versatile and reusable with negligible catalyst leaching, particularly in the asymmetric hydrogenation of substituted α, β-unsaturated acids or esters. The membranes comprise a hybrid inorganic/polymeric support material (i) and a molecular catalyst (ii) immobilized onto them, wherein: - (i) consists of a hybrid inorganic/polymeric compound in which inorganic compounds and organic polymers are chemically combined; - the inorganic compound is at least one selected from silicic, tungstic, molybdic and stannic acid compounds; - the organic polymers have hydroxy groups, preferably being polyvinylalcohol (PVA); - (ii) is a preformed metal catalyst, which contains at least one transition metal selected from Ru, Rh, Pd, Ir, Ni, Pt, Au and at least one chiral ligand selected from phosphino, amino and/or amino-phosphino species, preferably DIOP, BINAP Monophos or TMBTP.
摘要:
The invention provides a polymer support characterised in that the polymer is 6- amino 6-deoxy chitosan. Metal-immobilised 6-amino 6-deoxy chitosan is further provided, more particularly including one of Pd, Pt, Ru, Rh Ir, Os, Mn, Ni, Co and Fe in all their possible oxidation states complexed to 6-amino 6-deoxy chitosan through a Schiff-base ligand.
摘要:
The invention relates to a coordination complex system comprising a ligand having the formula: R 1 -SO 2 -NH-P (XR 2 ) 2 (1a); or R 1 -SO 2 -N=PH (XR 2 ) 2 (1b); or R 1 -SO(OH)=N-P(XR 2 ) 2 (1c); wherein X is independently O, S, NH, or a bond; R 1 and R 2 are independently selected from hydrogen and substituted or unsubstituted alkyl or aryl; wherein at least one equivalent of the ligand is complexed to an equivalent of a metal selected from a transition metal and lanthanide. The invention also relates to the use of said coordination complexes as catalysts in the hydrof ormylation, hydrogenation, transfer hydrogenation, hydrocyanation, polymerization, isomerization, carbonylation, cross-coupling, metathesis, CH activation, allylic substitution, aldol condensation, or Michael addition.
摘要:
The present invention relates to catalysts comprising at least one metal complex with at least two ligands which each have at least one pnicogen atom and at least one functional group capable of forming intermolecular, ionic interactions, wherein the complex has ligands which are dimerized via intermolecular ionic interactions, and also processes for reacting compounds which contain at least one carbon-carbon or carbon-heteroatom double bond by 1,2-addition in the presence of the catalysts of the invention.