Cyclomanganated (η6-arene)tricarbonylchromium complexes: synthesis and reactivity

Cyclometalation Using d-Block Transition Metals: Fundamental Aspects and Recent Trends

“…section 3.4). 199 For example, from the non-cyclometalated to the cyclometalated ligand followed by decoordination of the originally bound ligand and CO re-coordination produces the new cyclometalated complex. The hydrogen transfer is expected to be fully reversible, and hence, product distributions should be thermodynamically controlled.…”

Enantiopure Ferrocene‐Based Planar‐Chiral Iridacycles: Stereospecific Control of Iridium‐Centred Chirality

“…[2] 2) The metal introduced is then ad irect component of the new elemento fc hirality,a nd as such, is in an environment of pronounced asymmetry.S tereoselective CÀHa ctivation/metallationh as been utilised principally with palladium, and the resulting planar-chiral palladacycles are highly enantioselectivecatalysts for anumber of asymmetricorganic transformations. [3] Extension of stereoselective CÀHa ctivation to the synthesis of other non-racemic planar-chiral metallacycles has, to date, been limited to cyclomanganation, [4] cycloplatination [5] and cyclomercuration. [6,7] First reported in 1998, [8] iridium(III) half-sandwich complexes containing an h 5 -pentamethylcyclopentadienyl group (Cp*), aC ÀNb identatel igand, and one further neutral or anionic ligando fgeneral structures 1a/b (Figure 1) have been the subject of many further investigations.…”

The Exchange of Cyclometalated Ligands

“…The magnificent Djukic/Pfeffer duo explored the intermolecular exchange in cyclometalated manganese(I) carbonyl complexes containing electron-withdrawing η 6 -bound chromiumtricarbonyl unit [99]. The exchange given by Scheme 40 takes place cleanly under relatively mild conditions without acidic additives, and the cyclomanganated derivative of 2-phenylpyridine 10-1 was isolated in a 62% yield.…”