204396-51-0Relevant academic research and scientific papers
Sulfinylamide metathesis and nitrene transfer at complexes of hexavalent molybdenum and tungsten
Korn, Klaus,Schorm, Andrea,Sundermeyer, J?rg
, p. 2125 - 2132 (1999)
Protolysis of tungsten hexachloride with tosyl amide offers a direct access to [W(NTos)2Cl2]n (Ia). In presence of donor ligands coordination polymer 1 a can be converted into molecular complexes, e.g. [W(NTos)2Cl2(dme)] (1b), [W(NTos)2Cl2(PMe3)2] (1c) and [W(NTos)2Cl2(4,4′-Me2bipy)] (1d). The synthesis of the homologous molybdenum compound [Mo(NTos)2Cl2]n (2a) can be achieved via metathesis of [Mo(O)2Cl2]n, with sulfinyl amide Tos-NSO. An attempt to synthesize a molybdenum phosphine complex in an analogous manner as 1c, but starting from 2 a or its base adduct [Mo(NTos)2Cl2(dme)] (2b), leads to nitrene transfer to the phosphine. Me3P=NToS can be detected and the d2 molybdenum complex [Mo(NTos)Cl2(PMe3)3] (3) is isolated. 3 is characterized by a crystal structure analysis. In phosphine complex 1c, a similar nitrene abstraction is inhibited, in contrast Id is reacting with PMe3 under nitrene abstraction to yield [W(NTos)Cl2(4,4′-Me2bipy)(PMe3) 2] (4). This observation is in accord with a nitrene transfer induced via direct attack of the phosphine on the nitrogen atom of 1d.
Tosylimido complexes of tungsten(VI)
Leung, Wa-Hung,Wu, Man-Ching,Chim, Joyce L. C.,Wong, Wing-Tak
, p. 457 - 461 (2008/10/09)
Treatment of W(CO)6 with N,N-dichloro-p-toluenesulfonamide affords [W(NTs)2Cl2]x 1, which reacts with bipy (2,2′-bipyridine) to give the adduct W(NTs)2Cl2(bipy) 2. The average W - N(imido), W - Cl and W - N (bipy) distances are 1.782, 2.352 and 2.284 A, respectively. Reaction of [W(NTs)2Cl2]n with NaTp [Tp = hydrido(trispyrazolyl)borate] gives TpW(NTs)2Cl 4. These tungsten(VI) tosylimido complexes undergo imido transfer reactions with tertiary phosphine to give W(IV) and the N-tosyl phosphinimine.
