Abstract
Chiral transition metal atoms are not only present in tris‐chelate complexes [M(LL)3]n+, which were already resolved into the enantiomers by Alfred Werner, but also in organometallic half‐sandwich complexes such as 1 with three‐ or four‐legged piano‐stool structure. These complexes have been tools in the elucidation of the spatial course of reactions and in organic syntheses. Applications in enantioselective catalysis are beginning to show up.

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