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Journal ArticleDOI

The pentacyanonitrosylferrate ion—V. The course of the reactions of nitroprusside with a range of thiols

TL;DR: In the presence of oxygen, [Fe(CN)4NO]2− can reform as mentioned in this paper to give an effective stoichiometry of RS− to [Fe[CN]5NO]-2− substantially greater than 1 : 1 ; in the absence of oxygen and with a stoichiometric ratio of 1: 1, the [Fe{4NO}2− follows a well established pathway to yield [Fe·6]4−, Fe2+ and NO.
About: This article is published in Polyhedron.The article was published on 1988-01-01. It has received 55 citations till now.
Citations
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Journal ArticleDOI
TL;DR: The radical nature of NO cannot account for its cytotoxicity, but its reaction with superoxide to form peroxynitite and highly reactive hydroxyl radicals may be important in this context.

316 citations

Journal ArticleDOI
TL;DR: This review focuses on the chemistry between H2S and its three potential biological targets: oxidants, metals and thiol derivatives, discusses the applications of these basics into H 2S biology and methodology, and introduces the standard terminology to this youthful field.

266 citations

Journal ArticleDOI
TL;DR: In this article, the formation of water in supercritical carbon dioxide (scCO2) microemulsions stabilized by an ammonium carboxylate perfluoro polyether (PFPE) surfactant was investigated.
Abstract: In this paper, we present spectroscopic evidence for the formation of water in supercritical carbon dioxide (scCO2) microemulsions stabilized by an ammonium carboxylate perfluoro polyether (PFPE) surfactant. FTIR spectroscopy has been employed to determine the existence of “bulk” (hydrogen-bonded) water (H2O and D2O) at the core of the microemulsions, and to distinguish between this and the presence of “free” (monomeric) water dissolved in the scCO2 and builds on preliminary results described elsewhere (Johnston, K. P.; Harrison, K. L.; Clarke, M. J.; Howdle, S. M.; Heitz, M. P.; Bright, F. V.; Carlier, C.; Randolph, T. W. Science 1996, 271, 624). Cloud point studies confirm that optically transparent and thermodynamically stable microemulsion solutions are formed. We have investigated the utility of these microemulsions as novel environments for reaction chemistry. In particular, we have shown that, using the PFPE surfactant, an aqueous solution of potassium permanganate (KMnO4) may be dispersed in scCO2...

219 citations

References
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Book ChapterDOI
TL;DR: In this article, the nitrosyl complexes of iron-sulfur clusters were discussed and a variety of routes have been employed for the synthesis of heterometallic clusters containing Fe(NO)S fragments, and examples of such systems have been described.
Abstract: Publisher Summary This chapter discusses nitrosyl complexes of iron-sulfur clusters. The recent upsurge of interest in iron-sulfur-nitrosyl complexes has been stimulated in part by the reported isolation of [ Fe2(SMe)2(NO)4] from natural sources, by the obvious resemblances between these complexes and the naturally occurring [2Fe–2S] and [4Fe–4S] clusters of iron-sulfur proteins, and by the connections between tetrairon-sulfur-nitrosyls and cubane-type clusters. Salts containing the anions [ Fe2S2(NO)4]2– and [Fe4S3(NO)7]– are often called, from their colors, Roussin's red and black salts, respectively. Similarly, the organic derivatives [Fe2(SR)2(NO)4] are often called esters of Roussin's red salt. The number of iron-selenium-nitrosyl complexes is substantially smaller than the iron-sulfur-nitrosyl species, and there are a number of differences between the sulfur systems and their analogs containing selenium or tellurium. For selenium it is convenient to divide the complexes into three classes, dependent upon the stoichiometry of the metal-chalcogen framework. A variety of routes have been employed for the synthesis of heterometallic clusters containing Fe(NO)S fragments, and examples of such systems have been described. The diamagnetic behavior of the diiron and tetrairon complexes, despite the presence of formally d7 and/or d9 iron centers, indicates very strong coupling between the individual paramagnetic centers.

119 citations

Journal ArticleDOI
TL;DR: The constant de vitesse sur 2eme ordre pour la formation of Fe(CN) 5 N(O)SR 3− depend du pH quand l'espece RS − est reactive.
Abstract: La constante de vitesse sur 2eme ordre pour la formation de Fe(CN) 5 N(O)SR 3− depend du pH quand l'espece RS − est reactive. Avec les thiols les plus simples, il n'y a pas de relation avec le pH de pH 6 a 12

61 citations

Journal ArticleDOI
TL;DR: In this paper, the diamagnetic Roussin esters Fe 2 (SR) 2 (NO) 4 readily underwent exchange with thiols R′SH to yield Fe 2(SR′) 2(NO)4 : the exchange was faster in polar, coordinating solvents where paramagnetic, mononuclear complexes of types [Fe(NO)-2 (solvent) 2 ] + and Fe(NO)(solvent), were formed.

57 citations