METAL CATALYSTS COMPRISING NITROGEN-CONTAINING AROMATIC LIGANDS AND USE THEREOF

摘要

The present invention discloses a method for the preparation of a polymer from vinyl group-containing monomers comprising the step of polymerizing the vinyl group-containing monomers in the presence of a metal catalyst having a moiety M²⁺(Y)₄(X)₂, wherein M is a transition metal selected from the group of Ru, Mn, Fe, Co, Zr, Rh and Os, each Y independently is a nitrogen-containing aromatic mono-ring ligand, at least one ligand Y being substituted on at least one position with a carbon-containing substituent and, optionally, either two or four ligands Y being covalently bonded to each other in pairs, and X is selected from H₂O, CH₃CN, (CH₃) ₂S0, NH₃, and a mono-, di- or tri (C₁-C₄) -alkyl amine. The catalyst advantageously enables the synthesis of polymers with high molecular weights and low polydispersities from monomer compounds containing a vinyl group. The present invention further discloses specific novel ruthenium catalysts.