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P-Toluenesulfonate Oxygen Equilibration Associated with Ion-pair Return

and 2.8 g. (0.036 mole) * Thin layer chromatography (tlc) was used in conjunction
with g.c. to determine purity. It was found that tlc could readily detect \% of a
contaminant if the Rf values are sufficiently different. The latter is usually the case
for ...