| abstract |
This description addresses ionic compositions of matter comprising cations [Ct]+ and anions [A]-, in which the anion comprises a central core Group-13 element bound to fluoroaryl ligands. At least one of the fluoroaryl ligands is substituted with a siloxy group represented by the symbols -SiOR¿3?, wherein R is a C1-C30 hydrocarbyl or hydrocarbylsilyl substituent. [Ct]?+¿ may be selected from any cation capable of use with olefin polymerization catalysts and typically will be anilinium or ammonium trityl carbenium cations, Group-11 metal cations, silylium cations, the cations of the hydrated salts of Group-1 or -2 metals, and derivatives of the foregoing anilinium, ammonium, trityl carbenium, and silylium cations containing C¿1?-C20 hydrocarbyl, hydrocarbylsilyl, or hydrocarbylamine substituents for one or more hydrogen atoms of the cations. The ionic compositions described can be used to activate olefin polymerization catalysts, and can be prepared to dissolve in aliphatic solvents. Syntheses and polymerization are illustrated. |