Abstract
AbstractPhotochemically induced hydrogen–deuterium and hydrogen–tritium exchange between o‐methylbenzophenone and labelled methanol is shown to be catalysed by sodium carbonate. Both the (E) and (Z)‐photoenols participate in the exchange reaction whereas in absence of the catalyst only the (E)‐photoenol is reactive. Analysis of the measured quantum yields for hydrogen isotope exchange reaction allowed the determination of the relative population of transient photoenols and to its comparison with that obtained from the flash photolysis experiments. Both hydrogen kinetic and solvent isotope effects are discussed.
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