Patent ID: 8383540

Claim:
A catalyst composition comprising: a procatalyst composition comprising a magnesium moiety; a titanium moiety; and an internal electron donor comprising a 2-fluoro-malonate with the structure (II) wherein R 1 and R 2 are the same or different, and further wherein R 1 is selected from the group consisting of a C 3 -C 20 secondary alkyl group, a C 4 -C 20 tertiary alkyl group, a C 6 -C 20 aryl group, and a C 7 -C 20 alkylaryl group; and R 2 is selected from the group consisting of a C 1 -C 20 primary alkyl group and a substituted or unsubstituted C 2 -C 20 1-alkenyl group; a cocatalyst; and optionally an external electron donor.