| abstract |
The invention concerns a chromium complex corresponding to the formulan nwherein :n each X is, independently, selected from the group of halogen, alkoxide,naryloxide, amide, phosphide, hydride, hydrocarbyl or substituted hydrocarbyl;neach L is, independently, a neutral electron donor group which stabilizes thencomplex; n is 2 or 3; p is a number from 0 to 3; R 1 , R 2 , R 3 , R 4 and R 5 are, independently, hydrogen, hydrocarbyl, substitutednhydrocarbyl; R 6 and R 7 are, independently, aryl or substituted aryl; and its use for the polymerization of alpha-olefins. |