Carbon-13 fractionation in the oxidation of propionate of natural isotopic composition with permanganate and manganate
by Zielinski, M.; Fry, A.; Zielinska, A.; Ogrinc, N.; Papiernik-Zielinska, H.; Kobal, I.
Carbon-13 fractionation in the oxidation of sodium propionate of natural isotopic composition with permanganate in water solution and with manganate in alkaline solution has been investigated and compared with carbon-14 kinetic isotope effects in the oxidation of (3-C-14) - and (2-C-14) propionate with permanganate. The experimental carbon-13 isotope ratios, R(C-13/C-12)(cumul.), corrected for dilution of R(C-13/C-12), by carbon dioxide derived from all external sources and by carbon dioxide derived from (C-1) and from (C-3) of propionate at its complete and partial oxidations, used for calculation of C-13 alpha KIE, provided the carbon-13 isotope effects corresponding to initial oxidation of alpha carbon, which correlate well with (2-C-14) KIE determined previously, (k(12)/k(13) -1)x100 congruent to 1/2(k(12)/k(14) -1)x100 congruent to 1/2(4.6+/-0.3) at 373 K. The possibility of extension of isotope ratio measurements, using modern double collector mass spectrometers, from geochemical, biomedical, agriculture and environmental research to carbon-13 isotope effects studies in chemical organic reactions is briefly discussed.
- Journal
- Nukleonika
- Volume
- 45
- Issue
- 4
- Year
- 2000
- Start Page
- 221-224
- URL
- https://www.webofscience.com/wos/woscc/full-record/WOS:000166189700002
- ISBN/ISSN
- 1508-5791; 0029-5922