Olefin Metathesis by Well-Defined Complexes of Molybdenum and Tungsten

Olefin metathesis is a catalytic process whose key step consists of a reaction between an olefin and a transition metal alkylidene complex. Some of the best understood alkylidene catalysts contain Mo or W in its highest possible oxidation state, along with “supporting” alkoxide ligands and an imido ligand. Recent advances in our understanding of these catalysts from a fundamental perspective, and in ring opening metathesis polymerization (ROMP) and ring closing metathesis (RCM), in particular, are reviewed.

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