Amido ligands chelate

Keywords Amido ligands Chelates Homogeneous catalysis Rare-earth metals... 

The proposed reaction mechanism involves intermolecular nucleophilic addition of the amido ligand to the olefin to produce a zwitterionic intermediate, followed by proton transfer to form a new copper amido complex. Reaction with additional amine (presnmably via coordination to Cn) yields the hydroamination prodnct and regenerates the original copper catalyst (Scheme 2.15). In addition to the NHC complexes 94 and 95, copper amido complexes with the chelating diphosphine l,2-bis-(di-tert-bntylphosphino)-ethane also catalyse the reaction [81, 82]. 

Complexes with chelating amino and amido ligands 286... 

The action of bromine on potassium tris-malonatocobalt(iii) leads only to decomposition however, with iV-bromosuccinimide in CC, K3[Co(bromo-malonatelj] is formed.The structure of [Co(amidoxalato)2(H20)2]2H20 shows it to have a rra s-octahedral structure, the amido-oxalate ligands chelating via one carboxylate oxygen and the amidic oxygen. 

Aluminium complexes of chelating amido ligands are perhaps the most common type of monomeric four-coordinate aluminium amide. A full listing of such complexes will not be provided and selected examples will suffice to illustrate synthetic approaches and... 

Rare-Earth Metal Postmetallocene Catalysts with Chelating Amido Ligands... 

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