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 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 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: 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: 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 complexes of ruthenium of the structural formula I where X is an anionic ligand, Z is a monodentate to tridentate ligand which contains a metal and is nonionically bound to the ruthenium center, R1 and R2 are identical or different and are each hydrogen or/and a hydrocarbon group, but may also form a ring, and Ligand L is an N-heterocyclic carbene, and also to a process for preparing acyclic olefins having two or more carbon atoms or/and cyclic olefins having three or more carbon atoms and the use of at least one complex of the formula I in olefin metathesis.

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

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, 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 complexes of ruthenium of the structural formula I 1

Abstract: The invention relates to complexes of ruthenium of the structural formula I where X is an anionic ligand, Z is a monodentate to tridentate ligand which contains a metal and is nonionically bound to the ruthenium center, R1 and R2 are identical or different and are each hydrogen or/and a hydrocarbon group, but may also form a ring, and Ligand L is an N-heterocyclic carbene, and also to a process for preparing acyclic olefins having two or more carbon atoms or/and cyclic olefins having three or more carbon atoms and the use of at least one complex of the formula I in olefin metathesis.

Abstract: The use of compounds of the formula (I) R1aRebOc•Ld  (I), in which a=zero or an integer from 0 to 6 b=an integer from 1 to 4 c=an integer from 1 to 12 d=an integer from 0 to 4 L=Lewis base and the total of a, b and c is such as to comply with the penta- or hepta-valency of rhenium, with the proviso that c is not greater than 3•b, and in which R1 is absent, identical or different and is an aliphatic hydrocarbon radical having 1 to 10 carbon atoms, an aromatic hydrocarbon radical having 6 to 10 carbon atoms or an arylalkyl radical having 7 to 9 carbon atoms, where the R1 radicals can, where appropriate, be substituted identically or differently, independently of one another, as catalysts for the selective oxidation of olefins with cleavage of C═C bonds to give the corresponding carbonyl compounds in the presence of a peroxide-containing compound, where the amount of substance ratio of olefin to peroxide-containing compound is in a range from 1: