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  • 1985-1989  (2)
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  • 1
    Publication Date: 1986-07-01
    Print ISSN: 0044-2313
    Electronic ISSN: 1521-3749
    Topics: Chemistry and Pharmacology
    Published by Wiley
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 538 (1986), S. 177-190 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation of the Reaction of Sulfur with Sodium Nitrite in DMF, DMSO, and HMPAThe mechanism of the title reaction has been elucidated by VIS/UV, IR, 15N NMR, and ESR spectrometric measurements, gas analysis, and chromatography. The course of the complex reaction and the great number of products  -  nitrous oxide, nitric oxide, sodium thiosulfate, sulfate, polysulfides, polythionates, nitrate  -  can be explained with the assumption that at first perthionitrates NaSxNO2 are formed, which are decomposed either to give dinitrogen monoxide and thiosulfate, or, react with nitrite to yield nitrate and perthionitrite NaS2NO which dissociates reversibly into sodium trisulfide(-I) and nitrogen monoxide. (The details of the two main series of competitive and consecutive reaction steps can be seen from the tabular summary at the end of the text). The characteristic colour change during the reaction from blue-Green to orange-red is due to the formation of the two coloured species: S3- (blue, λmax = 620 nm, g = 2.029) and ONSS- (red, λmax = 448 nm, δ(15N) = 334 ppm, ref. K15NO3).
    Notes: Durch VIS/UV-, IR-, 15N-NMR- und ESR-spektrometrische Messungen, sowie chromatographische und Gas-Analysen ist der Mechanismus der Titelreaktion aufgeklärt worden. Der Verlauf der komplexen Umsetzung und die groβe Anzahl von Produkten  -  Distickstoffoxid, Stickstoffmonoxid, Natriumthiosulfat, Sulfat, Polysulfide, Polythionate, Nitrat  -  können mit der Annahme erklärt werden, daß zunächst Natriumperthionitrate NaSxNO2 entstehen, die sich in Distickstoffoxid und Thiosulfat zersetzen, oder auch mit Nitrit zu Nitrat und Perthionitrit, NaSSNO, reagieren, das reversibel in Stickoxid und Natriumtrisulfid(1 - ) dissoziiert. (Bezüglich der Einzelheiten der konkurrierenden und aufeinander folgenden Reaktionsschritte vgl. Tab. 2.) Der charakteristische Farbwechsel während der Titelreaktion von blau-grün über braun nach orangerot ist auf die Entstehung zweier Farbträger zurückzuführen: S3- (blau, λmax = 620 nm, g = 2,029) und ONSS- (rot, λmax = 448 nm, δ(15N) = 334 ppm, bez. auf K15NO3).
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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