1982
DOI: 10.1021/j100393a024
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Kinetic study of ferrous nitrosyl complexes

Abstract: LBL-13068The formation and dissociation rate constants and equilibrium constants The visible spectra of the complexes are also reported.

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Cited by 47 publications
(27 citation statements)
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“…Kinetic data for the NO release in the case of edta, nta, and dtpa are available from the literature (see Table 2). [2,5,17] In the case of Fe II (edta) the predicted literature value of k d Ͼ 60 s Ϫ1 could be confirmed, whereas significantly lower rates were measured in the present study for nta and dtpa. The trapping technique employed enables a direct measurement of the dissociation rate constant, and in principle must give more accurate values than those obtained using indirect methods.…”
Section: Stopped-flow Measurementssupporting
confidence: 76%
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“…Kinetic data for the NO release in the case of edta, nta, and dtpa are available from the literature (see Table 2). [2,5,17] In the case of Fe II (edta) the predicted literature value of k d Ͼ 60 s Ϫ1 could be confirmed, whereas significantly lower rates were measured in the present study for nta and dtpa. The trapping technique employed enables a direct measurement of the dissociation rate constant, and in principle must give more accurate values than those obtained using indirect methods.…”
Section: Stopped-flow Measurementssupporting
confidence: 76%
“…A combination of UV/Vis spectroscopy and electrochemical detection of NO was used to determine K NO , which was found to range from (1.0 Ϯ 0.1) ϫ 10 3 to (1.5 Ϯ 0.2) ϫ 10 7  Ϫ1 at 25°C for the series of complexes investigated. [1] k obs ϭ k f [Fe II (L)] ϩ k d (2) In principle it is also possible to measure k d directly, and not by the determination of an intercept according to Equation (2), by using an NO-trapping technique with the stopped-flow method. In this case Fe II (L)NO is treated with another complex that binds NO more strongly and rapidly than the system under investigation.…”
Section: Employed Kinetic Techniquesmentioning
confidence: 99%
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“…Significantly, the addition of NO to a 1 mM Fe(II) (FeSO 4 ) solution resulted in the rapid formation of the same adduct as evidenced by the identical UV-visible spectrum. The absorbance spectrum of the apparent NO adduct is identical to that of the so-called "brown ring" complex, Fe(II)NO(H 2 O) 5 with max ϭ 436 and 578 nm (Littlejohn and Chang, 1982). Thus, it is apparent that NO is able to reduce Fe(III) to Fe(II) in water to generate an ϩ NO (or equivalent) species.…”
Section: The Effect Of Selenium Depletion On Gshpx Activity and The Smentioning
confidence: 83%