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US 5,496,961 AGranted
Triazene oxide-transition metal complexes as hydrosilylation catalysts
AssigneeWacker Chemie AG
InventorsJochen Dauth, Josef Wolferseder, Bernward Deubzer
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Abstract
Organosilicon compounds having Si-bonded hydrogen atoms are reacted with organic compounds having aliphatic multiple bonds in the presence of triazene oxide-transition metal complexes. The triazene oxide-transition metal complexes are activated by heating at temperatures of from 50.degree. C. to 250.degree. C. and/or by irradiation with light.
Claims4
A process comprising reacting organosilicon compounds having Si-bonded hydrogen atoms with organic compounds having aliphatic multiple bonds in the presence of triazene oxide-transition metal complexes of the formula
- M(ANNNOR.sup.1).sub.a X.sub.b ( 1)
- where
- M is Pt, Pd, Rh, Ru, Os or Ir,
- R.sup.1 is a monovalent, unsubstituted or substituted hydrocarbon radical having from 1 to 18 carbon atoms per radical, a radical of the formula --SiR.sup.2.sub.c (OR.sup.2).sub.3-C or A,
- R.sup.2 is identical or different and is an alkyl radical having from 1 to 8 carbon atoms per radical,
- A is identical or different and is a radical of the formula ##STR5## G is CH or N Q is S, O or NH,
- R.sup.3 is a monovalent, unsubstituted or substituted hydrocarbon radical having from 1 to 12 carbon atoms per radical or is a radical of the formula --F, --Cl, --Br, --I, --H, --NH.sub.2, --NR.sup.2.sub.2, --NO.sub.2, --OH, OR.sup.2, --SH, --CN, --COOH, --COCl, --CONH.sub.2, --COR.sup.2, --CHO, --SO.sub.2 NHR.sup.2, --SO.sub.3 H, --SO.sub.2 Cl or --R.sup.4 --SiR.sup.2.sub.c (OR.sup.2).sub.3-c,
- R.sup.4 is a divalent hydrocarbon radical having from 1 to 8 carbon atoms per radical,
- R.sup.2 is identical or different and is an alkyl radical having from 1 to 8 carbon atoms per radical,
- X is identical or different and is a ligand selected from the group consisting of Cl, Br, I, NH.sub.3, P(C.sub.2 H.sub.5).sub.3, P(C.sub.6 H.sub.5).sub.3, H, CO, 1,5-cyclooctadiene, pyridine, bipyridine, acetate, acetylacetonate, phenylnitrile, ethylenediamine, acetonitrile, 2,5-norbornadiene, nitrate, nitrite, H.sub.2 O, benzene, diphenylphosphinoethane, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, ethylene and diphenylacetylene,
- a is 1, 2, 3 or 4,
- b is 0, or an integer from 1 to 6 and
- c is 0, 1, 2 or 3,
- wherein the triazene oxide-transition metal complexes are activated by heating at temperatures of from 50.degree. C. to 250.degree. C. irradiation with light, or by heating and irradiation with light.
11 more elements
Crosslinkable organopolysiloxane compositions comprising
- (1) organopolysiloxanes which have radicals containing aliphatic carbon-carbon multiple bonds,
- (2) organopolysiloxanes having Si-bonded hydrogen atoms, or in place of organopolysiloxanes (1) and (2)
- (3) organopolysiloxanes which have radicals containing aliphatic carbon-carbon multiple bonds and Si-bonded hydrogen atoms, and
- (4) triazene oxide-transition metal complexes of formula (I) as catalysts.
1 more element
A triazene oxide-platinum complex of the formula
- Pt (ANNNOR.sup.1).sub.a X.sub.b (VII)
- where
- A is identical or different and is a radical of the formula ##STR6## R.sup.1 is a monovalent, unsubstituted or substituted hydrocarbon radical having from 1 to 18 carbon atoms per radical, a radical of the formula --SiR.sup.2.sub.c (OR.sup.2).sub.3-c or A,
- X is identical or different and is a ligand selected from the group consisting of Cl, Br, I, NH.sub.3, P(C.sub.2 H.sub.5).sub.3, P(C.sub.6 H.sub.5).sub.3, H, CO, 1,5-cyclooctadiene, pyridine, bipyridine, acetate, acetylacetonate, phenylnitrile, ethylenediamine, acetonitrile, 2,5-norbornadlene, nitrate, nitrite, H.sub.2 O, benzene, diphenylphosphinoethane, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, ethylene and diphenylacetylene,
- a is 1, 2, 3 or 4, and
- b is 0, or an integer from 1 to 6.
3 more elements
A process for preparing triazene oxide-platinum complexes of formula VII, which comprises reacting triazene hydroxides of formula
- ANNNOHR.sup.1 (VIII),
- in the presence of bases with platinum compounds of the formula
- ptX.sub.d (IX),
- where
- A is identical or different and is a radical of the formula ##STR7## R.sup.1 is a monovalent, unsubstituted or substituted hydrocarbon radical having from 1 to 18 carbon atoms per radical, a radical of the formula --SiR.sup.2.sub.c (OR.sup.2).sub.3-c or A, and
- X is identical or different and is a ligand selected from the group consisting of Cl, Br, I, NH.sub.3, P(C.sub.2 H.sub.5).sub.3, P(C.sub.6 H.sub.5).sub.3, H CO, 1,5-cyclooctadiene, pyridine, bipyridine, acetate, acetylacetonate, phenylnitrile, ethylenediamine, acetonitrile, 2,5-norbornadiene, nitrate, nitrite, H.sub.2 O, benzene, diphenylphosphinoethane, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, ethylene and diphenylacetylene and d is an integer from 1 to 6.
3 more elements
Dependencies are inferred from the claim text.