Claims
- 1. A catalyst composition prepared by reacting together:
- (a) a source of a Group VIII metal;
- (b) a bidentate phosphine ligand having at least two phosphorus atoms joined by a bridging group of the formula
- --(N).sub.x --(P).sub.y --M
- where x is 0 and y is 0 or 1, and
- (c) a promoter.
- 2. A catalyst composition as claimed in claim 1 wherein the bridging group is of the formula
- --(NR.sup.2).sub.x --(PR.sup.3).sub.y --NR.sup.2 --
- where each R.sup.2 is the same or different and R.sup.2 and R.sup.3 represent a monovalent organic group.
- 3. A catalyst composition as claimed in claim 2 wherein the bidentate ligand has the formula I ##STR3## where each R.sup.1 is independently an aryl, alkyl, alkoxy, amido or substituted derivative thereof, R.sup.2 is a hydrogen, a hydrocarbyl or hetero group, R.sup.3 is a hydrocarbyl or hetero group.
- 4. A catalyst composition as claimed in claim 1 where x=y=0.
- 5. A catalyst composition as claimed in claim 3 wherein at least one of the R.sup.1 groups is an o-anisyl group.
- 6. A catalyst composition as claimed in claim 3 wherein x=y=0 and all R.sup.1 groups are o-anisyl.
- 7. A catalyst composition as claimed in claim 1 wherein the promoter is a source of either a non-coordinating or a weakly-coordinating anion.
- 8. A catalyst composition as claimed in claim 1 wherein the promoter is a boron hydrocarbyl compound.
- 9. A catalyst composition as claimed in claim 8 wherein the boron hydrocarbyl compound is a compound of the formula BXYZ where at least one of X, Y and Z is a monovalent hydrocarbyl group.
- 10. A catalyst composition as claimed in claim 9 wherein the compound of formula BXYZ is B(C.sub.6 F.sub.5).sub.3.
- 11. A catalyst composition as claimed in claim 9 wherein the compound of formula BXYZ is B(C.sub.6 H.sub.5).sub.3.
- 12. A catalyst composition as claimed in claim 1 wherein the promoter is an anion containing a plurality of boron atoms.
- 13. A catalyst composition as claimed in claim 1 wherein the promoter is an aluminoxane.
- 14. A catalyst composition as claimed in claim 1 wherein the Group VIII metal is palladium.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9607246 |
Apr 1996 |
GBX |
|
9704994 |
Mar 1997 |
GBX |
|
Parent Case Info
This application is a continuation of co-pending International Application No. PCT/GB97/00963 filed on Apr. 4, 1997.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5770684 |
Stewart et al. |
Jun 1998 |
|
Foreign Referenced Citations (5)
Number |
Date |
Country |
305012 |
Mar 1989 |
EPX |
335765 |
Oct 1989 |
EPX |
2693190 |
Jan 1994 |
FRX |
35 11 048 |
Oct 1986 |
DEX |
WO9204118 |
Mar 1992 |
WOX |
Non-Patent Literature Citations (1)
Entry |
"A New Approach to the Synthesis of Aryldifluorophosphines, Formation of CIS-Dichloro-BIS (Aryldifluorophosphine) Platinum (II) Complexes" (Journal of Fluorine Chemistry; L. Heuer and R. Schmutzler; vol. 39, pp. 197-216. .COPYRGT.1988). |
Continuations (1)
|
Number |
Date |
Country |
Parent |
PCTGB9700963 |
Apr 1997 |
|