| abstract |
A composition having the formula I n n nwhere R 1 and R 2 are independently hydrogen, C 1 to C 12 linear and branched alkyl, C 3 to C 12 cycloalkyl, aryl, C 1 to C 12 alkoxy, F, Cl, SO 3 , C 1 to C 12 perfluoroalkyl, and N(CH 3 ) 2 , n R 3 is independently selected from the group consisting of hydrogen, C 1 to C 12 linear and branched alkyl, C 3 to C 12 cycloalkyl, aryl, and 2,2,2-trifluoroethyl, A is —C(R 4 )—, —(CH 2 ) x —, —(CH 2 ) x NH(CH 2 ) x —, or —CY 2 CY 2 —, where R 4 is a hydrocarbyl, halosubstituted hydrocarbyl, or alkoxy group of from 1 to 12 carbon atoms, x is an integer from 1 to 12, and Y is halogen, and X is halogen, triflate, acetate, trifluoroacetate, hydride, or tetrafluoroborate. When combined with an activating co-catalyst is useful in polymerizing olefinic monomers. |