Claims
- 1. A metallocene represented by the formula R(Z)(Z)MQk wherein each Z is bound to M and is a cyclodienyl-type ligand selected from substituted or unsubstituted cyclopentadienyl, indenyl, tetrahydroindenyl, octahydrofluorenyl, and fluorenyl ligands; with the further proviso that at least one Z is a 9-fluorenyl having a hydrocarbyl substituent having 1 to 10 carbon atoms at the 4 position, R is a structural bridge linking the Z's which is a single tetravalent carbon atom connecting the Z's and which has its other valences satisfied by a terminally unsaturated hydrocarbyl substituent, having 2 to 20 carbon atoms, and by hydrogen or a hydrocarbyl group having 1 to 10 carbon atoms, and M is a metal selected from the group consisting of 4B, 5B, and 6B metals of the periodic table, each Q is the same or different and is selected from the group consisting of hydrogen, halogens, and organo radicals; k is a number sufficient to fill out the remaining valences of M.
- 2. A metallocene according to claim 1 wherein one Z is a fluorenyl radical having a methyl substituent at the 4 position and the other Z is selected from unsubstituted cyclopentadienyl or 3-methyl cyclopentadienyl.
- 3. A metallocene according to claim 2 wherein the bridging carbon is bound to a terminally unsaturated alkenyl radical having 3 to 10 carbon atoms.
- 4. A metallocene according to claim 3 wherein M is zirconium the bridging carbon is bound to a but-3-enyl radical and to a methyl radical.
- 5. A metallocene according to claim 4 having the name 1-(cyclopentadienyl)-1-(4-methyl-9-fluorenyl)-1-(but-3-enyl)-1-(methyl)methane zirconium dichloride.
- 6. A metallocene according to claim 4 having the name 1-(3-methyl cyclopentadienyl)-1-(4-methyl-9-fluorenyl)-1-(but-3-enyl)-1-(methyl)methane zirconium dichloride.
Parent Case Info
This application is a division of application Ser. No. 09/317,300, filed May 24, 1999, now U.S. Pat. No. 6,291,382, the disclosure of which is incorporated herein by reference.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
WO 9852686 |
Nov 1998 |
WO |