| abstract |
Monoolefins with 2 to 12 carbon atoms can be used alone or in a mixture and with polar monomers such as methyl acrylate in the presence of a palladium complex of the formula [L1 Pd L2] · + · An · - · and optionally with the addition of an alkyl aluminum compound to give polymers or copolymers polymerize. In the Pd complex, L1 represents a neutral bidentate N, N'-disubstituted diazadiene, preferably a diazabutadiene ligand, L2 is an alkoxycycloalkene carbanion with 7 to 8 C ring atoms, preferably a 1-methoxycycloocta-4-ene 8sigma-4pi ligand L2, which is bound to the palladium atom by a sigma bond and via the C = C double bond via a complexing pi bond, and An · - · an anion of a non or hardly esterifiable and is not or weakly coordinating acid. New Pd complex catalysts are also shown for the polymerization and copolymerization. |