Simple low-valent amido, imido, and nitrido complexes of tungsten
- Univ. of North Carolina, Chapel Hill, NC (United States); and others
Most transition metal imido (or nitrene) complexes are nucleophilic at nitrogen, but certain species exhibit reactivity patterns indicative of electrophilic character. For example, high-valent manganese(V) and iron(V) derivatives, activated by trifluoroacetyl and tosyl groups, respectively, transfer the nitrene unit to alkenes to produce aziridines. McElwee-White et al. have reported that the putative (CO){sub 5}W{double_bond}NC{sub 6}H{sub 5} complex can behave as a nucleophile or an electrophile; the latter property is illustrated by reaction with PPh{sub 3} to form PhNPPh{sub 3}. Our work has focused on preparing low-valent metal nitrene complexes containing strong {pi}-acid ligands in the coordination sphere, features which may impart electrophilic character to nitrogen. This communication describes the simple amido (NH{sub 2}{sup -}), imido (NH{sup 2-}), and nitrido (N{sup 3-}) derivatives of the low-valent tungsten moiety Tp{prime}(CO){sub 2}W(Tp{prime} = hydrotris(3,5-dimethyl-1-pyrazolyl)borate) and their facile interconversions. The nitrode complex serves as a convenient precursor to a variety of cationic nitrene complexes. 15 refs., 2 figs.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG05-85ER13430
- OSTI ID:
- 567314
- Journal Information:
- Journal of the American Chemical Society, Vol. 114, Issue 20; Other Information: PBD: 23 Sep 1992
- Country of Publication:
- United States
- Language:
- English
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