This review summarizes the progress made in the last eight years on the synthesis and use in catalysis of polymer supported
metal complexes obtained by co-polymerization of metal-containing monomers (MCMs) with suitable co-monomers and cross-linkers.
These materials are divided into four important classes: microporous organic polymers, molecularly imprinted polymers (MIPs), macropouros
organic polymers, polymers obtained by ring opening metathesis polymerization (ROMP). Although the MIPs have essentially a
macroporous structure, they constitute a separate group of catalysts for their peculiar way of synthesis. The discussion focuses on the efficiency
and reusability of all these potentially recoverable catalysts.