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Molybdenum diazenido complexes

The first reported diazenido metal complex was obtained by King and Bisnette (1964) by ligand exchange, as shown in (10-5) one of the three carbonyl groups in the molybdenum complex 10.20 was replaced by an aryldiazenido ligand (10.21) in tetrahydrofuran. The 18-electron Mo configuration requires the aryldiazenido ligand to be a three-electron donor the anionic complex 10.20 becomes a neutral product (10.21) by this substitution. [Pg.430]

The principal interest of diazenido complexes of molybdenum(II) is that they are formed by the alkylation or protonation of coordinated dinitrogen. They thus represent a unique group of... [Pg.1292]

Lappert and Poland (1969) were the first authors who reported on the discovery and characterization of mononuclear alkyldiazenido complexes by reaction of (tri-methylsilyl)diazomethane with tricarbonyl(cyclopentadienyl)molybdenum hydride and the analogous tungsten hydride. Scheme (10-18) demonstrates that these reactions are not simple substitutions of a carbonyl by a diazenido ligand, but that they are insertions of the diazoalkane into the M-H bond (see also Lappert and Lorberth, 1967). [Pg.440]

Hussain, H., Leigh, G.J., Modh-Ali, H. and Pickett, C.J. Mechanism of alkylation of alkyldiazenido-complexes of molybdenum(II) and tungsten(II) influence of metal and co-ligands on the nucleophilicity of a diazenido-group J.Chem.Soc. Dalton Trans., (1986), 1473-1477... [Pg.377]

Molybdenum(V) tris(dithiocarbamate) diazenido complexes, [Mo(NNR )-(S2CNR2)3], have been known since the early 1970s (864,865). They can be prepared in high yields from [Mo02(S2CNR2)2] and hydrazines, NH2NHR, in refluxing methanol in the presence of a further equivalent of dithiocarbamate salt (Eq. 72) (866). More recently, Poveda and co-workers (441) prepared... [Pg.187]


See other pages where Molybdenum diazenido complexes is mentioned: [Pg.383]    [Pg.435]    [Pg.448]    [Pg.450]    [Pg.189]    [Pg.182]    [Pg.1271]    [Pg.1294]    [Pg.1295]    [Pg.1341]    [Pg.241]    [Pg.136]    [Pg.137]    [Pg.441]    [Pg.446]    [Pg.3110]    [Pg.3133]    [Pg.3134]    [Pg.3180]    [Pg.414]   
See also in sourсe #XX -- [ Pg.1292 , Pg.1294 , Pg.1295 ]

See also in sourсe #XX -- [ Pg.3 , Pg.1292 , Pg.1294 , Pg.1295 ]




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