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Chelating or Bridging? Halide-Controlled Binding Mode of Diamido Donor Ligands in Iron(III) Complexes

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Anjan Kumar Das, Zohreh Moatazedi, Garry Mund, Andrew J. Bennet, Raymond J. Batchelor, and Daniel B. Leznoff*

Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada

Inorg. Chem., 2007, 46 (2), pp 366–368

DOI: 10.1021/ic061832m

Publication Date (Web): December 15, 2006

Section:

Inorganic Chemicals and Reactions

Abstract

In a series of iron(III) halide complexes of the form {FeX[MesN(SiMe₂)]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 iron(III) halide. The bromide analogue can also be synthesized by reacting the iron(II) precursor with a bromonium transfer agent (stabilized by adamantylideneadamantane). The latter reaction may proceed via an iron(IV) intermediate, which can oxidize the normally noncoordinating, inert [B(Ar_F)₄]^- counteranion [Ar_F = 3,5-(CF₃)₂Ph].

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Synthesis, Structures, and Kinetics of Mixed-Donor Amido−Amino−Siloxo Ligands from Symmetrical Diamidosilyl Ether Ligands via a Retro-Brook Rearrangement
Farzad Haftbaradaran, Angela M. Kuchison, Michael J. Katz, Gabriele Schatte, and Daniel B. Leznoff
Inorganic Chemistry2008 47 (3), 812-822
- Synthesis, Structures, and Kinetics of Mixed-Donor Amido−Amino−Siloxo Ligands from Symmetrical Diamidosilyl Ether Ligands via a Retro-Brook Rearrangement
  Farzad Haftbaradaran, Angela M. Kuchison, Michael J. Katz, Gabriele Schatte, and Daniel B. Leznoff
  Inorganic Chemistry2008 47 (3), 812-822
  The retro-Brook rearrangement reaction was employed to synthesize a new class of mixed-donor amidoaminosiloxo ligands {RNLiSiMe2N(R)SiMe2OLi} (R= propyl, 3,5-Me2Ph, 2,4,6-Me3Ph, 2,6-iPr2Ph, 3,5-(CF3)2Ph) in one facile step and high yield. Selected ...
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History

Published In Issue January 22, 2007
Received September 26, 2006

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Communication

Chelating or Bridging? Halide-Controlled Binding Mode of Diamido Donor Ligands in Iron(III) Complexes

Abstract

Citing Articles

Synthesis, Structures, and Kinetics of Mixed-Donor Amido−Amino−Siloxo Ligands from Symmetrical Diamidosilyl Ether Ligands via a Retro-Brook Rearrangement