Back to results
US 8,013,095 B2Granted
Ru sulfoxide complexes, their preparation and use
AssigneeWacker Chemie AG
InventorsMarco Hofmann, Hans-Juergen Elberle
Life of this patent
Estimating the term…
Abstract
Ru(0) complexes containing sulfoxide ligands and aliphatically unsaturated ligands are effective hydrosilylation catalysts useful in particular for addition curing organosilicon compositions.
Claims7
A composition comprising a Ru(0)-sulfoxide complex catalyst (D) of the formula (I),
- wherein
- a) at least one of the ligands L1-L5 is a sulfoxide ligand of the formula (II)
- R1—S(═O)—R2 (II),
- where the radicals R1 and R2 are identical or different and are selected independently from the group consisting of straight-chain and branched alkyl groups, alkenyl groups and alkynyl groups;
- straight-chain and branched alkyl groups, alkenyl groups and alkynyl groups having at least one substituent selected from the group consisting of alkoxy, siloxy, aryloxy, aryl, silyl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, carboxamido, carbamoyl groups and halogen atoms;
- and phenyl groups which are substituted or unsubstituted, where substituents are selected from the group consisting of alkyl, alkenyl, alkynyl, silyl, alkoxy, siloxy, aryloxy, aryl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, carboxamido and carbamoyl groups and halogen atoms;
- and wherein R1 and R2 are optionally joined to form a heterocycle containing the sulfur atom or a heterocycle containing further heteroatoms,
- with the proviso that R1 and R2 together have 2-24 carbon atoms;
- b) at least one of the ligands L1-L5 is a ligand which is π-bonded via one or two C═C functions and has the formula (III)
- where
- the radicals R3-R6 are selected independently from the group consisting of hydrogen, straight-chain or branched, cyclic or acyclic, C1-C50-alkyl, C2-C50-alkenyl, C2-C50-alkynyl, and C6-C30-aryl radicals in which individual carbon atoms are unsubstituted or substituted by halogen, O, N, S, Si or P atoms, and
- c) remaining ligands L1-L5 are identical or different and are selected from the group consisting of uncharged 2-, 4- or 6-electron donor ligands containing CO;
- CNR′″, where R′″ is selected from the group consisting of alkyl and aryl;
- PR′″3 and P(OR′″)3, where R′″ is selected from the group consisting of alkyl and aryl;
- ligands containing N donors;
- ligands which contain S donors and do not correspond to the sulfoxides of formula (I);
- ligands containing O donors;
- and carbene ligands;
- with the proviso that none of the ligands L1-L5 is 1,5-cyclooctadiene or 1,3,5-cyclooctatriene.
16 more elements
In a process for hydrosilylation wherein a hydrosilylation catalyst is employed, the improvement comprising employing a Ru(0) complex of formula (I) as a hydrosilylation catalyst
- wherein
- a) at least one of the ligands L1-L5 is a sulfoxide ligand of the formula (II)
- R1—S(═O)—R2 (II),
- where the radicals R1 and R2 are identical or different and are selected independently from the group consisting of straight-chain and branched alkyl groups, alkenyl groups and alkynyl groups;
- straight-chain and branched alkyl groups, alkenyl groups and alkynyl groups having at least one substituent selected from the group consisting of alkoxy, siloxy, aryloxy, aryl, silyl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, carboxamido, carbamoyl groups and halogen atoms;
- and phenyl groups which are substituted or unsubstituted, where substituents are selected from the group consisting of alkyl, alkenyl, alkynyl, silyl, alkoxy, siloxy, aryloxy, aryl, alkoxycarbonyl, aryloxycarbonyl, acyloxy, carboxamido and carbamoyl groups and halogen atoms;
- and wherein R1 and R2 are optionally joined to form a heterocycle containing the sulfur atom or a heterocycle containing further heteroatoms,
- with the proviso that R1 and R2 together have 2-24 carbon atoms;
- b) at least one of the ligands L1-L5 is a ligand which is π-bonded via one or two C═C functions and has the formula (III)
- where
- the radicals R3-R6 are selected independently from the group consisting of hydrogen, straight-chain or branched, cyclic or acyclic, C1-C50-alkyl, C2-C50-alkenyl, C2-C50-alkynyl, and C6-C30-aryl radicals in which individual carbon atoms are unsubstituted or substituted by halogen, O, N, S, Si or P atoms, and
- c) remaining ligands L1-L5 are identical or different and are selected from the group consisting of uncharged 2-, 4- or 6-electron donor ligands containing CO;
- CNR′″, where R′″ is selected from the group consisting of alkyl and aryl;
- PR′″3 and P(OR′″)3, where R′″ is selected from the group consisting of alkyl and aryl;
- ligands containing N donors;
- ligands which contain S donors and do not correspond to the sulfoxides of formula (1);
- ligands containing O donors;
- and carbene ligands;
- with the proviso that none of the ligands L1-L5 is 1,5-cyclooctadiene or 1,3,5-cyclooctatriene.
16 more elements
Dependencies are inferred from the claim text.