Bridged cyclopentadienylmagnesium compounds and process for the preparation thereof and use thereof for preparing metallocenes

Abstract From the Canadian patent

Disclosed are processes for preparing and new bridged cyclopentadienylmagnesium compounds of the general formula (1), Q(CpR a) (Cp'R'a,)Mg (1), wherein: Cp is a cyclopentadienyl or an indenyl radical; R and R' are the same or different, and each is selected from the group consisting of alkyl, phosphine amino, alkylamino, dialkylamino, alkoxy alkoxy-alkyl, aryl-alkyl, and aryloxy-alkyl groups; 0 ~ a ~ 4 and 0 ~ a' ~ 4; Cp' is cyclopentadienyl or indenyl, or when a' is 1 Cp'R', can be NR" wherein R" is a C1-C12 alkyl or a C6-C10 aryl radical; and Q is a single-membered or multi-membered bridge between Cp and Cp' and represents wherein R1 and R2 are identical or different and each is a, …