Reactions of bis-μ-iodo-bis(dinitrosyliron) with halide ions and with thiols: An electron paramagnetic resonance study

Anthony R. Butler; Christopher Glidewell; Andrew R. Hyde; John C. Walton

doi:10.1016/S0277-5387(00)84503-9

Reactions of bis-μ-iodo-bis(dinitrosyliron) with halide ions and with thiols: An electron paramagnetic resonance study

Anthony R. Butler, Christopher Glidewell^*, Andrew R. Hyde, John C. Walton

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Solutions of Fe₂(NO)₄I₂ in DMF exhibit EPR spectra characteristic of [Fe(NO)₂]⁺ at concentrations of 2 x 10^-4 mol dm^-3, and of an equilibrium mixture of [Fe(NO)₂ ⁺, Fe(NO)₂I, and [Fe(NO)₂I₂]^- at higher concentrations: in THF solutions only Fe(NO)₂I is observed, regardless of concentration. Addition of excess halide ions X^- (X=Cl, Br, I) to the DMF solution yields [Fe(NO)₂X₂]^-, but addition of excess I^- or Br^- to the THF solution yields [Fe(NO)₂I₂ ^- or Fe₂(NO)₄Br₂ respectively. In mixed THF/Et₃N solutions, mixtures of [Fe(NO)₂]⁺, Fe(NO)₂I, and [Fe(NO)₂I₂]^- are again formed, and subsequent addition of a thiol RSH causes formation of [Fe(NO)₂(SR)₂]^-, a precursor of Fe₂(NO)₄(SR)₂. A scheme is suggested to describe the steps in the preparatively useful conversion of Fe₂(NO)₄I₂ into Fe₂(NO)₄(SR)₂.

Original language	English
Pages (from-to)	303-306
Number of pages	4
Journal	Polyhedron
Volume	4
Issue number	2
DOIs	https://doi.org/10.1016/S0277-5387(00)84503-9
Publication status	Published - 1 Jan 1985

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title = "Reactions of bis-μ-iodo-bis(dinitrosyliron) with halide ions and with thiols: An electron paramagnetic resonance study",

abstract = "Solutions of Fe2(NO)4I2 in DMF exhibit EPR spectra characteristic of [Fe(NO)2]+ at concentrations of 2 x 10-4 mol dm-3, and of an equilibrium mixture of [Fe(NO)2 +, Fe(NO)2I, and [Fe(NO)2I2]- at higher concentrations: in THF solutions only Fe(NO)2I is observed, regardless of concentration. Addition of excess halide ions X- (X=Cl, Br, I) to the DMF solution yields [Fe(NO)2X2]-, but addition of excess I- or Br- to the THF solution yields [Fe(NO)2I2 - or Fe2(NO)4Br2 respectively. In mixed THF/Et3N solutions, mixtures of [Fe(NO)2]+, Fe(NO)2I, and [Fe(NO)2I2]- are again formed, and subsequent addition of a thiol RSH causes formation of [Fe(NO)2(SR)2]-, a precursor of Fe2(NO)4(SR)2. A scheme is suggested to describe the steps in the preparatively useful conversion of Fe2(NO)4I2 into Fe2(NO)4(SR)2.",

author = "Butler, {Anthony R.} and Christopher Glidewell and Hyde, {Andrew R.} and Walton, {John C.}",

year = "1985",

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doi = "10.1016/S0277-5387(00)84503-9",

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AU - Butler, Anthony R.

AU - Glidewell, Christopher

AU - Hyde, Andrew R.

AU - Walton, John C.

PY - 1985/1/1

Y1 - 1985/1/1

N2 - Solutions of Fe2(NO)4I2 in DMF exhibit EPR spectra characteristic of [Fe(NO)2]+ at concentrations of 2 x 10-4 mol dm-3, and of an equilibrium mixture of [Fe(NO)2 +, Fe(NO)2I, and [Fe(NO)2I2]- at higher concentrations: in THF solutions only Fe(NO)2I is observed, regardless of concentration. Addition of excess halide ions X- (X=Cl, Br, I) to the DMF solution yields [Fe(NO)2X2]-, but addition of excess I- or Br- to the THF solution yields [Fe(NO)2I2 - or Fe2(NO)4Br2 respectively. In mixed THF/Et3N solutions, mixtures of [Fe(NO)2]+, Fe(NO)2I, and [Fe(NO)2I2]- are again formed, and subsequent addition of a thiol RSH causes formation of [Fe(NO)2(SR)2]-, a precursor of Fe2(NO)4(SR)2. A scheme is suggested to describe the steps in the preparatively useful conversion of Fe2(NO)4I2 into Fe2(NO)4(SR)2.

AB - Solutions of Fe2(NO)4I2 in DMF exhibit EPR spectra characteristic of [Fe(NO)2]+ at concentrations of 2 x 10-4 mol dm-3, and of an equilibrium mixture of [Fe(NO)2 +, Fe(NO)2I, and [Fe(NO)2I2]- at higher concentrations: in THF solutions only Fe(NO)2I is observed, regardless of concentration. Addition of excess halide ions X- (X=Cl, Br, I) to the DMF solution yields [Fe(NO)2X2]-, but addition of excess I- or Br- to the THF solution yields [Fe(NO)2I2 - or Fe2(NO)4Br2 respectively. In mixed THF/Et3N solutions, mixtures of [Fe(NO)2]+, Fe(NO)2I, and [Fe(NO)2I2]- are again formed, and subsequent addition of a thiol RSH causes formation of [Fe(NO)2(SR)2]-, a precursor of Fe2(NO)4(SR)2. A scheme is suggested to describe the steps in the preparatively useful conversion of Fe2(NO)4I2 into Fe2(NO)4(SR)2.

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JO - Polyhedron

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ER -

Reactions of bis-μ-iodo-bis(dinitrosyliron) with halide ions and with thiols: An electron paramagnetic resonance study

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