Conclusions
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1.
The reaction of disproportionation of a geminal radical pair formed in photodissociation of desoxybenzoins is magnetic- and isotope-selective to the same degree as the recombination reaction.
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2.
The efficiency of separation of12C and13C isotopes based on the magnetic isotope effect decreases in the order desoxybenzoin, α-methyldesoxybenzoin, and α,α-dimethyldesoxybenzoin during photolysis, which is due to an increase in the probability of isotope-selective disproportionation of geminal radical pairs.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 264–268, February, 1989.
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Tarasov, V.F., Step, E.N., Margulis, L.A. et al. Photolysis of desoxybenzoins in micelles, chemical yield of benzaldehyde, and magnetic isotope effect. Russ Chem Bull 38, 221–225 (1989). https://doi.org/10.1007/BF00953600
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DOI: https://doi.org/10.1007/BF00953600