Atmospheric processes with the participation toxic trichloroacetic and monochloroacetic acids
Abstract
The paper considers the processes occurring with toxic chloroacetic acids in gas and water. The kinetics of the reaction of fluorine atoms with toxic trichloroacetic acid was studied by the method of competing reactions at T = 293 K. Four reactions of fluorine atoms: with trichloroethane, ethanol, cyclohexane, and 2-fluoroethanol have been used as competing reactions. The rate constant of the reaction of fluorine atoms with trichloroacetic acid was calculated, k (293 K) = (4.3 ± 0.8) ⸱ 10-11 см3 молекула-1 с-1. The mass spectrum of the negative ions of an aqueous solution of monochloroacetic acid was obtained by vacuum electrospray. On the distribution by degree of hydration for undecomposed ions, kinks were found in the region between doubly and triple hydrated ions. This kink was interpreted as the boundary between the inner and outer hydration shells of the acidic residue ions containing chlorine atoms. The inner shell was formed by water molecules strongly bound to the ion, while the second shell is formed by weakly bound ones.
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Copyright (c) 2022 Igor I. Morozov, Evgeniy S. Vasiliev, Polina S. Khomyakova, Olga S. Morozova, Kirill O. Sinyukov, Natalia N. Kuznetsova, and Sergey V. Savilov
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