Chemical Safety Science, 2018, Volume 2, No 2, p. 151 — 157


Identification of hazardous substances


УДК 544.473:547.322                                                       Download PDF (RUS)

DOI: 10.25514/CHS.2018.2.14112



 N. D. Volkov*, I. I. Morozov, and E. S. Vasiliev

Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia,

Received November 11, 2018

Published December 26, 2018

Abstract – The majority of reactions of toxic tertiary amine pyridine studied previously were carried out mainly in the liquid phase, and only a few studies investigated pyridine reactions in the gas phase. For that reason, determination of pyridine reactivity in a gaseous medium is of considerable interest. Therefore, the kinetics of the reaction of atomic fluorine with pyridine and 2-fluoroethanol was studied by competing reaction method using molecular-beam mass spectrometry. The rate constant for the reaction of pyridine with atomic fluorine was determined for the first time and was found to be k = (8.0 ± 3.0)∙10-10 cm3 mol-1 s-1. The main products of this reaction were identified as pyridinyl and fluoropyridine.

Keywords: toxicity, pyridine, 2-fluoroethanol, pyridinyl, mass spectrometry, fluorine atoms, free radicals, reaction rate constant.


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