Stable Bromiranium Ions with Weakly-Coordinating Counterions as Efficient Electrophilic Brominating Agents
作者:Christoph Ascheberg、Jonathan Bock、Florenz Buß、Christian Mück-Lichtenfeld、Constantin G. Daniliuc、Klaus Bergander、Fabian Dielmann、Ulrich Hennecke
DOI:10.1002/chem.201701643
日期:2017.8.25
Electrophilic halogenating agents are an important class of reagents in chemical synthesis. Herein, we show that sterically demanding bromiranium ions with weakly coordinating counterions are highly reactive electrophilic brominating agents. Despite their high reactivity these reagents are stable, in one case even under ambient conditions and can be applied in electrophilic halogenations of alkenes
Chelating or Bridging? Halide-Controlled Binding Mode of Diamido Donor Ligands in Iron(III) Complexes
作者:Anjan Kumar Das、Zohreh Moatazedi、Garry Mund、Andrew J. Bennet、Raymond J. Batchelor、Daniel B. Leznoff
DOI:10.1021/ic061832m
日期:2007.1.1
In a series of iron(III) halide complexes of the form FeX[MesN(SiMe(2))]2O}2 (Mes = mesityl; X = Cl, Br, I), the ancillary diamidosilylether ligand can either chelate to one metal or instead bridge two metal centers, as a function of the halide coligand. The complexes are prepared from diamidosilyletheriron(II) precursors, which are oxidized with iodine, benzyl bromide, or PhICl2 to yield the appropriate