This invention relates to copolymers produced by a polymerization method
comprising contacting at least one olefin monomer, at least one polar
monomer, an optional activator, and a catalyst compound represented by
the formula: ##STR00001## wherein M is selected from groups 3-11 of the
periodic table; ##STR00002## L.sup.1 represents a formal anionic ligand,
L.sup.2 represents a formal neutral ligand, a is an integer greater than
or equal to 1; b is greater than or equal to 0; c is greater than or
equal to 1, E is nitrogen or phosphorus, Ar.sup.0 is arene,
R.sup.1-R.sup.4 are, each independently, selected from hydrogen,
hydrocarbyl, substituted hydrocarbyl or functional group, provided
however that R.sup.3 and R.sup.4 do not form a naphthyl ring, N is
nitrogen and O is oxygen.