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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 123 (1992), S. 501-508 
    ISSN: 1434-4475
    Keywords: Reactions ; PAN ; Sulfur compounds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktionen von Peroxyacetylradikalen mit reduzierten Schwefelverbindungen wurden bei 55°C in NO2 bei einem Totaldruck von 1 000 mbar untersucht. Die Radikale wurden im Gleichgewicht mit Peroxyacetylnitrat und NO2 in großem Überschuß generiert. Der nach erster Ordnung verlaufende Zerfall vonPAN wurde in Abwesenheit und Anwesenheit und von einigen ppm CH3SH, C2H5SH,n-C4H9SH, (CH3)2S und (CH3S)2 gemessen. Computersimulierung der Geschwindigkeitskonstanten für die Peroxyacetylradikale ergab mit den genannten Schwefelverbindungen 3.7, 2.8, 13.0, 0.9 und 1.8·10−16 ch3/s. Eine elektronenfangende Verbindung der Thiole mit NO2 wurde beobachtet.
    Notes: Summary The reaction of peroxyacetyl radicals with reduced sulfur compounds was studied at 55°C in N2 at 1 000 mbar total pressure. The radicals were generated in equilibrium with peroxyacetyl nitrate and NO2 in large excess. The pseudo first order decay ofPAN was measured in the absence and presence of several 100 ppm CH3SH, C2H5SH,n-C4H9SH, (CH3)2S, and (CH3S)2. Computer simulations yielded the following rate constants of peroxyacetyl radicals with the above mentioned sulfur compounds: 3.7, 2.8, 13.0, 0.9, and 1.8·10−16 cm3/s, respectively. An electron capturing compound of the thiols with NO2 was observed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of atmospheric chemistry 21 (1995), S. 151-164 
    ISSN: 1573-0662
    Keywords: PAN ; PPN ; peroxyacyl nitrates ; solubility ; hydrolysis ; salinity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract The solubilities and hydrolysis rates of PAN (peroxyacetyl nitrate) and its homologues PPN (peroxypropionyl nitrate), PnBN (peroxy-n-butyl nitrate), PiBN (peroxy-isobutyl nitrate) and MPAN (peroxymethacryloyl nitrate) in liquid water have been studied at 20 °C. Temperature dependencies were measured for PAN and PPN. The solubilities of peroxyacyl nitrates decrease smoothly with increasing carbon-chain length fromH (293 K)=4.1 M atm−1 (PAN) toH (293 K)=1.0 M atm−1 (PiBN). Hydrolysis-rate constants, which cover the range fromk h (293 K)=(2.4−7.4)×10−4 s−1, do not show a systematic chain-length dependency. Solubilities of PAN and PPN in solutions which mimic the composition and ionic strength of sea water are 15% and 20% lower than in pure water. The hydrolysis rate constants are not affected.
    Type of Medium: Electronic Resource
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