Complexes with amido or alkoxy ligands

In Section 12.5, we described group 2 metal halide complexes such as t/-aM5-[Cal2(THF)4] and /ran5-[SrBr2(py)5]. 

The number of complexes of the group 2 metals with N- or O-donor ligands continues to grow, notably those incorporating sterically demanding amido or alkoxy ligands. 

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Complex ions in aqueous solution Complexes with amido or alkoxy ligands Diagonal relationships... 

In contrast to unsaturated alkoxy-functionalized NHCs, a deprotonation of corresponding imidazolium salts of saturated analogues did not result in alkali metal adducts but in bicyclic products HL (R = Dipp, Mes, i-Pr) 19. Arnold et al reported a series of lanthanide NHC complexes (Scheme 6.2) based on these ligand precursors by using a protonolysis reaction with internal bases such as rare earth tris[bis(trimethylsilyl)amido] or alkyl compounds. ... 

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