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Dediazoniations of Arenediazonium Ions in Homogeneous Solutions. Part XV. Products of dediazoniation of p-chlorobenzenediazonium tetrafluoroborate in weakly alkaline aqueous solutions

✍ Scribed by Jacques Besse; Wolfgang Schwarz; Heinrich Zollinger


Publisher
John Wiley and Sons
Year
1981
Tongue
German
Weight
523 KB
Volume
64
Category
Article
ISSN
0018-019X

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✦ Synopsis


Abstract

The products of decomposition of solutions of p‐chlorobenzenediazonium tetrafluoroborate in aqueous buffer solutions (pH 9.0–10.3; ionic strength 0.1–0.5) at 20.0° have been analyzed quantitatively. Up to eleven low molecular weight compounds could be identified besides the major product, the complex polymeric diazo tar. The distribution of products is influenced by trace amounts of oxygen as well as by p‐chlorophenol and the radical trapping reagent iodoacetic acid. Mechanisms of formation of the products are discussed.


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Dediazoniation of Arenediazonium Ions in
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The kinetics of reactions of p-chlorobenzenediazonium ions in aqueous buffer solutions (pH 9.0-10.6) under N, (< 5 ppb of 0,) have been measured between 20 and 50°C. The formation of trans-diazotate is first-order with respect to the concentration of hydroxyl ions and to the equilibrium concentratio

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## Abstract The mechanism of dediazoniation of arenediazonium tetrafluoroborates in 2,2,2‐trifluoroethanol (TFE) is strongly dependent on the concentration of added pyridine. The added base complexes with the diazonium ion and diverts it to a homolytic pathway. Complex formation is indicated by the