NMR Studies of Octahedral Di- And Tetracyano-(2,2 ' -Bipyridine) Iron(ii) Complexes

Agarwala, B. V.; Ramanathan, K. V.; Khetrapal, C. L.

doi:10.1080/00958978508073899

Cited by 6 publications

(7 citation statements)

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“…[Fe(bpy) 2 (CN) 2 ]·3H 2 O was prepared and characterized as described in the literature. , Its 1 H NMR spectrum is in good agreement with prior reports ,, The 1 H NMR spectrum of K 2 [Fe(bpy)(CN) 4 ]·3H 2 O was in good agreement with a prior report …”

Section: Methodssupporting

confidence: 87%

“…The 1 H NMR spectrum of the reaction products arising from an equimolar mixture of GSH and [Fe III (bpy) 2 (CN) 2 ] + shows that the Fe III reagent is cleanly reduced to [Fe II (bpy) 2 (CN) 2 ] (Supporting Information, Figure S7). This conclusion is based on the chemical shift values in the region 7.2–9.4 ppm, which are characteristic of [Fe(bpy) 2 (CN) 2 ] . The sharpness of these peaks is an indication that there is no residual Fe III in the product mixture.…”

Section: Resultsmentioning

confidence: 99%

“…37,38 Its 1 H NMR spectrum is in good agreement with prior reports. 39 [Fe(bpy) 2 (CN) 2 ]NO 3 and K 2 [Fe-(bpy)(CN) 4 ]•3H 2 O were made using Schilt's standard procedures. 34,37,38 The 1 H NMR spectrum of K 2 [Fe(bpy)(CN) 4 ]•3H 2 O was in good agreement with a prior report.…”

Section: ■ Introductionmentioning

confidence: 99%

“…34,37,38 The 1 H NMR spectrum of K 2 [Fe(bpy)(CN) 4 ]•3H 2 O was in good agreement with a prior report. 39 Li[Fe(bpy)(CN) 4 ]•2.5H 2 O was prepared with a slight modification of a published procedure: 34,40 A solution of K 2 [Fe(bpy)(CN) 4 ] was oxidized by sparging with an excess of Cl 2 gas. Then to the oxidized solution was added saturated hot solution of PPh 4 Cl in 1:1 mol ratio.…”

Section: ■ Introductionmentioning

confidence: 99%

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Oxidation of Glutathione by Hexachloroiridate(IV), Dicyanobis(bipyridine)iron(III), and Tetracyano(bipyridine)iron(III)

Bhattarai

Stanbury

2012

Inorg. Chem.

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The aqueous oxidations of glutathione (GSH) by [IrCl(6)](2-), [Fe(bpy)(2)(CN)(2)](+), and [Fe(bpy)(CN)(4)](-) are described. All three reactions are highly susceptible to catalysis by traces of copper ions, but this catalysis can be fully suppressed with suitable chelating agents. The direct oxidation by [IrCl(6)](2-) yields [IrCl(6)](3-) and GSO(3)(-); some GSSG is also obtained in the presence of O(2). The two Fe(III) oxidants are reduced to their corresponding Fe(II) complexes with nearly quantitative formation of GSSG. The kinetics of these reactions have been studied at 25 °C and μ = 0.1 M between pH 1 and 11. All three reactions have rate laws that are first order in [M(ox)] and [GSH](t) and show a general increase in rate with increasing pH. Detailed studies of the pH dependence enable the rate law to be elaborated with terms for reaction of the individual protonation states of GSH. These pH-resolved rate constants are interpreted with a mechanism having rate-limiting outer-sphere electron-transfer from the various thiolate forms of GSH.

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Section: Methodssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxidation of Glutathione by Hexachloroiridate(IV), Dicyanobis(bipyridine)iron(III), and Tetracyano(bipyridine)iron(III)

Bhattarai

Stanbury

2012

Inorg. Chem.

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“…For example, the IR spectrum of Fe(CN)2(bipy) 2 shows a single VCN at 2080 cm -1 favoring a trans structure, but its ~3C NMR data are better interpreted in terms of a cis geometry (Agarwala, Ramanathan & Khetrapal, 1985). To present a correct description for the structure of this type of metal complex, a representative of these series was examined by single-crystal X-ray diffraction methods.…”

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confidence: 99%