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 journalArticlepeer-review

9 Citations (Scopus)

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 languageEnglish
Pages (from-to)303-306
Number of pages4
JournalPolyhedron
Volume4
Issue number2
DOIs
Publication statusPublished - 1 Jan 1985

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