caa a22 4500 445327871 CHVBK 20180317142727.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10953-011-9713-3 doi (NATIONALLICENCE)springer-10.1007/s10953-011-9713-3 Kinetic Study of the Oxidation of N , N -Dimethylethanolamine by Bis(Hydrogenperiodato)Argentate(III) in Aqueous Solution [Elektronische Daten] [Hongmei Shi, Yukun Guo, Weijun Kang] The oxidation of N,N-dimethylethanolamine (DMEA) by bis(hydrogenperiodato) argentate(III) ([Ag(HIO6)2]5−) was studied in aqueous alkaline medium. Formaldehyde and dimethylamine were identified as the major oxidation products after the oxidation of DMEA. The oxidation kinetics was followed spectrophotometrically in the temperature range of 25.0 °C-40.0 °C. It was found that the reaction was first order in [Ag(III)]; the oberved first-order rate constants k obsd as functions of [DMEA], [OH−] and total concentration of periodate ( $[\mathrm{IO}_{4}^{-}]_{\mathrm{tot}}$ ) were analyzed and were revealed to follow a rate expression: $k_{\mathrm{obsd}} = (k_{1} +k_{2}[\mathrm{OH}^{-}])K_{1}K_{2}[\mathrm{DMEA}]/\{f([\mathrm{OH}^{-}])[\mathrm{IO}_{4}^{-}]_{\mathrm{tot}}+ K_{1} + K_{1}K_{2}[\mathrm{DMEA}]\}$ . Rate constants k 1 and k 2 and equilibrium constant K 2 were derived; activation parameters corresponding to k 1 and k 2 were computed. In the proposed reaction mechanism, aperidato-Ag(III)-DMEA ternary complex is formed indirectly through a reactive intermediate species [Ag(HIO6)(OH)(H2O)]2−. In subsequent rate-determining steps as described by k 1 and k 2, the ternary complex decays to Ag(I) through two reaction pathways: one of which is spontaneous and the other is prompted by an OH−. Springer Science+Business Media, LLC, 2011 Ag(III) nationallicence N , N -dimethylethanolamine nationallicence Oxidation nationallicence Kinetics nationallicence Mechanism nationallicence Shi Hongmei School of Public Health, Hebei Medical University, 050017, Shijiazhuang, Hebei Province, P.R. China aut Guo Yukun School of Chemistry and Environmental Science, Hebei University, 071002, Baoding, Hebei Province, P.R. China aut Kang Weijun School of Public Health, Hebei Medical University, 050017, Shijiazhuang, Hebei Province, P.R. China aut Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/7(2011-07-01), 1371-1381 0095-9782 40:7<1371 2011 40 10953 https://doi.org/10.1007/s10953-011-9713-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10953-011-9713-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shi Hongmei School of Public Health, Hebei Medical University, 050017, Shijiazhuang, Hebei Province, P.R. China aut NATIONALLICENCE 700 1- Guo Yukun School of Chemistry and Environmental Science, Hebei University, 071002, Baoding, Hebei Province, P.R. China aut NATIONALLICENCE 700 1- Kang Weijun School of Public Health, Hebei Medical University, 050017, Shijiazhuang, Hebei Province, P.R. China aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/7(2011-07-01), 1371-1381 0095-9782 40:7<1371 2011 40 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer