Current understanding of the σ-bond metathesis reactions of LnMR + R′–H → LnMR′ + R–H

The metathesis reactions of LnMR + R′-H → LnMR′ + R–H are important fundamental reactions in organometallic chemistry and catalysis. In this article, we reviewed the current understanding of the reactions from a theoretical point of view. Selected examples of the reactions involved in catalysis were discussed.