Transition Metal Derivatives of Monodentate Amides

Prior to 1980, well-characterized, homoleptic and heteroleptic diorganoamido derivatives of almost all the earlier (i.e. groups 3-6) transition metals had been reported. These continue to attract much attention and new examples are a constant feature of the literature. Tables and provide a listing of the structurally characterized (X-ray or 

It will be immediately apparent from Tables 6.1 and 6.2 that amides of the groups 4-6 elements are by far the most numerous. Furthermore, the number of second and third row element amido derivatives of these groups approaches or exceeds those of the first row. It can also be seen that for the first row elements homoleptic amides in the highest oxidation 

An additional aspect of the literature since 1980 has been an increasing interest in the characterization of charged amido complexes. In 1980 none had been strucmrally characterized. Several anionic complexes, including, for example, the homoleptic species [Na(thf)2Ti N(C6F5)2 4l [Na(thf)6]2[Zr(Ti -NC4H4)6], [ U(thf) 2Zr(NMe2)6] [ Li 

Other interesting anionic transition metal amido derivatives have come from the reactions of primary amido ligands with metal halides by Fenske and coworkers. This has allowed the synthesis of a range of cobalt, nickel and copper amido cluster species with unusual structures which also incorporate NPh as coligand (cf. Table 

Cationic transition metal amide complexes have been investigated in part because of their potential in catalysis p irticularly for olefin polymerization. Much of this work has concerned polydentate amido, linked cyclopentadienyl-amido or delocalized nitrogen centred bidentate ligands (see later). However, the structures of a small number of cationic complexes containing monodentate amido ligands have been determined. These include 

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