caa a22 4500 469109556 CHVBK 20180323133106.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02039921 doi (NATIONALLICENCE)springer-10.1007/BF02039921 Carbon-14 kinetic isotope effect in the decarbonylation of lactic acid[1-14C] [Elektronische Daten] [M. Zieliński, H. Papiernik-Zielińska] The carbon-14 kinetic isotope effect for the decarbonylation of lactic acid[1-14C] in sulfuric acid has been measured in the temperature interval of 20-90°C. The experimental values of (k12C/k14C) are compared with the theoretical14C kinetic isotope effect calculated assuming that one carbon-oxygen stretching vibration is lost in the rate-determining step. The discrepancy between experimentally observed temperature dependence of the14C kinetic isotope effect and the theoretical one is explained by the possible side reactions which change the apparent degrees of decarbonylation and isotopic composition of CH3CHOHCOOH[1-14C] used in experiments aiming at the determination of carbon-14 kinetic isotope effect in the decarbonylation process itself. Akadémiai Kiadó, 1992 Zieliński M. Isotopc Laboratory (Laboratory of Nuclear Chemistry), Faculty of Chemistry, Jagiellonian University, 30-060, Kraków, (Poland) aut Papiernik-Zielińska H. Isotopc Laboratory (Laboratory of Nuclear Chemistry), Faculty of Chemistry, Jagiellonian University, 30-060, Kraków, (Poland) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 162/1(1992-09-01), 25-33 0236-5731 162:1<25 1992 162 10967 https://doi.org/10.1007/BF02039921 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039921 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zieliński M. Isotopc Laboratory (Laboratory of Nuclear Chemistry), Faculty of Chemistry, Jagiellonian University, 30-060, Kraków, (Poland) aut NATIONALLICENCE 700 1- Papiernik-Zielińska H. Isotopc Laboratory (Laboratory of Nuclear Chemistry), Faculty of Chemistry, Jagiellonian University, 30-060, Kraków, (Poland) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 162/1(1992-09-01), 25-33 0236-5731 162:1<25 1992 162 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer