Abstract: Akylidene complexes of ruthenium containing N-heterocyclic carbene ligands and their use as highly active, selective catalysts for olefin metathesis The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphate, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphate, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to a complex compound of ruthenium of the general structural formula I in which X1 and X2 may be identical or different and represent an anionic ligand, in which R1 and R2 are identical or different, but may also have a ring, in which R1 and R2 represent hydrogen or/and a hydrocarbon group, in which the ligand L1 is a N-heterocyclic carbene and in which the ligand L2 is a neutral electron donor, especially a N-heterocyclic carbene or an amine, imine, phosphane, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, wherein R1, R2, R3 and R4 represent hydrogen or/and hydrocarbon groups.

Abstract: The present invention relates to a process for preparing organopolysiloxanes by reacting halosilane with alcohol and water in the presence of the desired organopolysiloxane in a reaction unit comprising a distillation column, optionally a reflux condenser, and a vessel already containing desired organopolysiloxane, by heating the vessel contents to boiling under reflux, introducing halosilane into the column above the lower column end, removing hydrogen halide from the distillation column and continuously removing organopolysiloxane from the vessel at the same rate in which it is formed, by constantly adding halosilane, alcohol and water to the reaction unit in such amounts that more water is always present in the reaction unit than is consumed by the added Si-halogen units of the halosilanes.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphate, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphate, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: A process for continuously preparing compounds containing SiOC groups, in which chlorosilane(s) are partially reacted with alcohol and optionally also with water in a prereactor, and the partial reaction product therefrom is fed to a first reaction unit comprising a column, reacted with alcohol and optionally water to give a crude product which still comprises volatile constituents, and the crude product is transferred to a second reaction unit comprising a column in which alcohol is additionally introduced, and freed there of volatile constituents, optionally in the presence of an unreactive organic solvent, the desired end product being removed at the lower end of the second reaction unit.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphate, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: Alkylidene complexes of ruthenium containing N-heterocyclic carbene ligands and their use as highly active, selective catalysts for olefin metathesis The invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: Addition-crosslinking silicone resin compositions containing selected high functionality addition curable organosilicon compounds can be cured at relatively low temperatures and can produce highly transparent, hard polymers which are suitable for many uses, in particular for the potting or embedding of electrical componts such as LEDs.

Abstract: A process for continuously preparing compounds containing SiOC groups, in which chlorosilane(s) are partially reacted with alcohol and optionally also with water in a prereactor, and the partial reaction product therefrom is fed to a first reaction unit comprising a column, reacted with alcohol and optionally water to give a crude product which still comprises volatile constituents, and the crude product is transferred to a second reaction unit comprising a column in which alcohol is additionally introduced, and freed there of volatile constituents, optionally in the presence of an unreactive organic solvent, the desired end product being removed at the lower end of the second reaction unit.

Abstract: The present invention relates to a process for preparing organopolysiloxanes by reacting halosilane with alcohol and water in the presence of the desired organopolysiloxane in a reaction unit comprising a distillation column, optionally a reflux condenser, and a vessel already containing desired organopolysiloxane, by heating the vessel contents to boiling under reflux, introducing halosilane into the column above the lower column end, removing hydrogen halide from the distillation column and continuously removing organopolysiloxane from the vessel at the same rate in which it is formed, by constantly adding halosilane, alcohol and water to the reaction unit in such amounts that more water is always present in the reaction unit than is consumed by the added Si-halogen units of the halosilanes.

Abstract: Addition-crosslinking silicone resin compositions containing selected high functionality addition curable organosilicon compounds can be cured at relatively low temperatures and can produce highly transparent, hard polymers which are suitable for many uses, in particular for the potting or embedding of electrical componts such as LEDs.

Abstract: The invention relates to a complex compound of ruthenium of the general structural formula I in which X1 and X2 may be identical or different and represent an anionic ligand, in which R1 and R2 are identical or different, but may also have a ring, in which R1 and R2 represent hydrogen or/and a hydrocarbon group, in which the ligand L1 is a N-heterocyclic carbene and in which the ligand L2 is a neutral electron donor, especially a N-heterocyclic carbene or an amine, imine, phosphane, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether, wherein R1, R2, R3 and R4 represent hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to novel aqueous compositions containing (1) organosilicon compounds comprising ammonium groups, containing at least one grouping consisting of two protonated nitrogen atoms per molecule, said atoms being linked by at least three carbon atoms, (2) acid anions, the corresponding acids thereof having a pka value higher than 0, (3) water, (4) optionally a solvent which can be mixed with water, and (5) optionally emulsifying agents. Said aqueous compositions are preferably homogeneous aqueous solutions.

Abstract: Abstract of the Disclosure Akylidene complexes of ruthenium containing N-heterocyclic carbene ligands and their use as highly active, selective catalysts for olefin metathesisThe invention relates to a complex of ruthenium of the structural formula I, where X1 and X2 are identical or different and are each an anionic ligand, R1 and R2 are identical or different and can also contain a ring, and R1 and R2 are each hydrogen or/and a hydrocarbon group, the ligand L1 is an N-heterocyclic carbene and the ligand L2 is an uncharged electron donor, in particular an N-heterocyclic carbene or an amine, imine, phosphine, phosphite, stibine, arsine, carbonyl compound, carboxyl compound, nitrile, alcohol, ether, thiol or thioether,where R1, R2, R3 and R4 are hydrogen or/and hydrocarbon groups.

Abstract: The invention relates to a complex of ruthenium of the structural formula I, 1

Abstract: Organopolysiloxanes bearing quaternary ammonium groups and containing units of the general formula —[R2—(SiR2—O)b—SiR2—R2—N+R12]n—·nX−  (I′) where R are identical or different monovalent, SiC-bonded, optionally substituted C1-12 hydrocarbon radicals, R1 are identical or different monovalent, optionally substituted C1-12 hydrocarbon radicals or are a bridging alkylene radical, X is an organic or inorganic anion, R2 is a divalent hydrocarbon radical having at least 4 carbon atoms which contains at least one hydroxyl group and is optionally interrupted by one or more oxygens, b is an integer from 1 to 200 and n is an integer from 1 to 50. and processes for the preparation thereof.

Abstract: The invention relates to novel aqueous compositions containing (1) organosilicon compounds comprising ammonium groups, containing at least one grouping consisting of two protonated nitrogen atoms per molecule, said atoms being linked by at least three carbon atoms, (2) acid anions, the corresponding acids thereof having a pka value higher than 0, (3) water, (4) optionally a solvent which can be mixed with water, and (5) optionally emulsifying agents. Said aqueous compositions are preferably homogeneous aqueous solutions.