PDO or BMTZ ligand for supported coordinated PT hydrosilylation catalysts
The invention describes single-site metal catalysts such as Pt single-site centers on powdered oxide supports with a 1,10-phenanthroline-5,6-dione (PDO) or bis-pyrimidyltetrazine (BMTZ) ligand on powdered MgO, Al 2 O 3 , or CeO 2 .
1. A single site catalyst system comprising: (a) a single site catalyst precursor compound and (b) a support, wherein the single site catalyst precursor comprises one or more of the formulae:
wherein each X, independently, is a halide; and
wherein n is 1-5 when present.
2. The single site catalyst system of claim 1 , wherein the support is selected from the group consisting of powdered MgO, Al 2 O 3 , and CeO 2 .
3. The single site catalyst system of claim 2 , wherein the support is MgO.
4. The single site catalyst system of claim 2 , wherein the support is Al 2 O 3 .
5. The single site catalyst system of claim 2 , wherein the support is CeO 2 .
6. A process comprising:
(a) contacting a single site catalyst precursor comprising one or more of the formulae:
wherein each X, independently, is a halide; and
wherein n is 1-5 when present;
(b) contacting the supported catalyst system, a vinyl terminated alkene and a hydrosilylation agent under hydrosilylation conditions; and
(c) hydrosilylating the vinyl terminated alkene to form a hydrosilylated alkyl product.
7. The process of claim 6 , wherein the support is selected from the group consisting of powdered MgO, Al 2 O 3 , and CeO 2 .
8. The process of claim 7 , wherein the support is MgO.
9. The process of claim 7 , wherein the support is Al 2 O 3 .
10. The process of claim 6 , wherein the vinyl terminated alkene is 1-octene.
11. The process of claim 6 , wherein the hydrosilylation agent comprises dimethoxymethylsilane.