Towards a quantitative approach to the utilization of magnetic effects as a means of isotopic enrichment. [Progress report, January 1, 1989--April 1, 1992]
The photolysis of methyldesoxybenzoin in sodium dodecyl sulfate micellar solutions, produces benzaldehyde and styrene as disproportionation products of the triplet geminate radical pair. We have found that both the benzaldehyde and the recovered methyldeoxybenzoin are enriched in 13-C. These results provide the first direct evidence that both recombination and disproportionation are identically selective to the magnetic isotope effect, an important point anticipated by theory, but previously untested. An investigation of the photostereoisomerization of the diasteromers of 2,4-diphenylpentane-3-one in micellar solutions has allowed a quantitative analysis of the probabilities of recombination of the micellized primary geminate radical pair toward formation of different combination products. The results show that within the confidence provided by highly accurate data, the primary geminate radical pairs recombine to regenerate the precursor substrate structure or diastereomer with equal probability.
- Research Organization:
- Columbia Univ., New York, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-87ER13653
- OSTI ID:
- 10152133
- Report Number(s):
- DOE/ER/13653--6; ON: DE92015199
- Country of Publication:
- United States
- Language:
- English
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