NOVEL CATALYSTS FOR THE POLYMERISATION OF CARBONYL-CONTAINING OR CYCLIC MONOMERS

摘要

The present invention relates to metal/organic complexes of Formula (I), (II), (III), (IV), (V) and (VI) that are useful as catalysts for the polymerisation of carbonyl- containing or cyclic monomers. Typical polymerisation reactions are, for example, those of lactides. R is independently selected at each occurrence from the group comprising: hydrogen, hydrocarbyl and substituted hydrocarbyl, M is a Lewis-acidic metal, and, if present, X is any suitable counter ion.