Pseudo-tetrablock copolymers with ethylene and a functionalized comonomer

Pseudo-tetrablock copolymers comprised of ethylene and 5-norbornen-2-yl acetate (1), were synthesized using the initiator system (LiPr2)Ni(η1-CH2Ph)(PMe3) (2) [(LiPr2) = N-(2,6-diisopropylphenyl)-2-(2,6-diisopropylphenylimino)propanamide] and 2.5 equivalents of Ni(COD)2 [bis(1,5-cyclooctadiene) nickel.