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Tungsten diazenido complexes

The overall reaction from 10.25 to 10.26 is an insertion into a metal-hydrogen bond. It is, however, only an apparent insertion, as the Rh — H bond dissociates in the diazene diazenido equilibrium (10-9), as already emphasized by Sutton in 1975. Other interesting cases are the reactions of tungsten mono- and bis-hydrido complexes with diazonium salts. The monohydrido complex 10.27 yields the aryldiazene complex 10.28 (Smith and Hillhouse, 1988) in an 1,1-insertion (10-11). The bishydrido complex 10.29 (10-12), however, adds one of the two H-atoms at the... [Pg.432]

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]


See other pages where Tungsten diazenido complexes is mentioned: [Pg.241]    [Pg.383]    [Pg.431]    [Pg.441]    [Pg.446]    [Pg.450]    [Pg.372]    [Pg.182]    [Pg.434]    [Pg.414]    [Pg.87]   
See also in sourсe #XX -- [ Pg.219 , Pg.222 , Pg.223 , Pg.224 ]




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