Syntheses and uses of isotopically labelled compounds with sulphur‐containing functional groups

Experiments on δ34S mixing between organic and inorganic sulfur species during thermal maturation

“…Previous studies on isotope exchange using 35 S radiolabeled model compounds report on a wide variety of sulfur bonds that are isotopically exchangeable (Edwards et al, 1948;Douglas et al, 1949;Guryanova et al, 1952;Obloentsev and Nikitin, 1964;Fedoseev, 1990;Zielinski and Kanska, 1993). The data reported in these studies is difficult to compare to our results because of the variety of chemical conditions used such as organic solvents as the reaction medium.…”

“…Complete isotopic exchange between aqueous Na 2 35 S and Me 2 S at ambient temperatures was reported by Zielinski and Kanska (1993). Isotopic exchange occurs between thiolane derivatives and Na 2 35 S in ethanol, but not with thiophenic sulfur at temperatures above 98°C (Obloentsev and Nikitin, 1964).…”

“…These studies report on a wide range of organic sulfur compounds that can exchange isotopes with inorganic reduced sulfur species (Edwards et al, 1948;Douglas et al, 1949;Guryanova et al, 1952;Obloentsev and Nikitin, 1964;Fedoseev, 1990;Zielinski and Kanska, 1993). These exchange data relate to the radioactive sulfur isotope ( 35 S) rather than stable isotopes ( 34 S and 32 S) and therefore, have a relatively large analytical error.…”