Nitrogen Fixation Revisited on Iron(0) Dinitrogen Phosphine Complexes
摘要:
A reinvestigation of the treatment of [Fe(N-2)(PP)(2)] (PP = depe, dmpe) with acid revealed no ammonium formation. Instead, rapid protonation at the metal center to give hydride Complexes was observed. Treatment of [Fe(N-2)(dmpe)(2)] with methylating agents such as methyl triflate or methyl tosylate resulted methylation of the metal center to afford [FeMe(N-2)(dmpe)(2)](+). Treatment of [Fe(N-2)(dmpe)(2)] With trimethylsilyl triflate, however, resulted in reactibn at dinitrogen affording NH4+ on subsequent treatment with acid. The side-on bound hydrazine complex [Fe-(N2H4)(dmpe)(2)](2+) and bis(ammonia) complex [Fe(NH3)(2)(dmpe)(2)](2+) were identified by N-15 NMR spectroscopy as other species formed in the reaction mixture.
Cationic silyldiazenido complexes of the Fe(diphosphine)<sub>2</sub>(N<sub>2</sub>) platform: structural and electronic models for an elusive first intermediate in N<sub>2</sub> fixation
作者:Adam D. Piascik、Peter J. Hill、Andrew D. Crawford、Laurence R. Doyle、Jennifer C. Green、Andrew E. Ashley
DOI:10.1039/c7cc04188h
日期:——
Functionalisation of Fe-bound dinitrogen affords novel cationic silyldiazenido complexes, which are structural surrogates for unstable protonated intermediates in N2 fixation.
Whittlesey, Michael K.; Mawby, Roger J.; Osman, Robert, Journal of the American Chemical Society, 1993, vol. 115, # 19, p. 8627 - 8637
作者:Whittlesey, Michael K.、Mawby, Roger J.、Osman, Robert、Perutz, Robin N.、Field, Leslie D.、Wilkinson, Matthew P.、George, Michael W.
DOI:——
日期:——
Base-Mediated Conversion of Hydrazine to Diazene and Dinitrogen at an Iron Center
作者:Leslie D. Field、Hsiu L. Li、Alison M. Magill
DOI:10.1021/ic801856q
日期:2009.1.5
The treatment of the hydrazine complex cis-[Fe(N2H4)(dmpe)(2)](2+) with base afforded the diazene complex cis-[Fe(N2H2)(dmpe)(2)]. This reaction is reversed by the treatment of the diazene complex with a mild acid, while treatment of the hydrazine complex with a mixture of KOBut and (BuLi)-Li-t afforded the dinitrogen complex [Fe(N-2)(dmpe)(2)].