ABSTRACT
Formation of metal-containing monomers (MCMs) is due to the filling of the low-energy vacant orbitals of metals with n-lone electron pairs of the oxygen, nitrogen, phosphorus, and other heteroatoms in such groups as amine nitrile, amide, ester, etc. In principle, the MCMs of this class are conventional monomers of metal compounds with organic ligands, distinguished by the presence of a reactive multiple bond in a given ligand. Usually, their synthesis is far simpler than that of the some other monomers. Various vinylpyridines such as 4-vinylpyridine, 2-vinylpyridine, and 2-methyl-5-vinylpyridine are characterized by the presence of a lone electron pair at the nitrogen atom with distinct basic properties. Vinylazole complexes appear to comprise the best studied class of donor-acceptor-type MCMs. Unsaturated nitriles contain two coordination sites: a lone electron pair at the nitrogen atom and the p-electrons of the unsaturated bond.
