Allyl-Transition Metal Systems

As a continuation of a report published in 1963, recent results in the field of allyl-transition metal complexes are described. Syntheses and reactions of these compounds, as well as the bonding between metal and allyl group, are discussed. Allyl-transition metal complexes form the basis of extremely selective catalysts for homogeneous reactions of 1, 3-diolefins and of olefins; the metal atoms in these ''matrix'' catalysts are either ''bare'' or are bound to only a few ligands.