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Isotopic effects during catalytic hydrogenation
Author(s) -
Bitner E. D.,
Selke E.,
Rohwedder W. K.,
Dutton H. J.
Publication year - 1964
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02661890
Subject(s) - tritium , deuterium , chemistry , hydrogen , kinetic isotope effect , catalysis , solubility , tritium illumination , inorganic chemistry , mass spectrometry , catalytic hydrogenation , radiochemistry , analytical chemistry (journal) , organic chemistry , chromatography , nuclear physics , physics
No isotopic discrimination is observed during catalytic reduction of methyl oleate with hydrogen‐tritium gas mixtures. One explanation may be that at atmospheric pressure and 40C the isotopic effect on solubility is small and the concentration of the dissolved hydrogen isotopes is rate limiting. Tritium in methyl 9‐octadecenoate‐9,10‐T is not released during saturation of the double bond but appears in the gaseous phase upon completion of hydrogenation, as indicated by an ion chamber. No isotopic discrimination is observed in the reduction of methyl oleate with mixtures of hydrogen, deuterium, and tritium; however, a mass spectrometer indicates an increase in the hydrogen‐deuterium ratio during hydrogenation. Under the conditions described, tritium and deuterium may be used to study the mechanism of hydrogenation without significant isotopic effects.