Towards a quantitative approach to the utilization of magnetic effects as a means of isotopic enrichment

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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 ... continued below

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Pages: (16 p)

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Turro, N.J. May 1, 1992.

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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.

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Pages: (16 p)

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OSTI; NTIS; GPO Dep.

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  • Other: DE92015199
  • Report No.: DOE/ER/13653-6
  • Grant Number: FG02-87ER13653
  • DOI: 10.2172/5225222 | External Link
  • Office of Scientific & Technical Information Report Number: 5225222
  • Archival Resource Key: ark:/67531/metadc1066246

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  • May 1, 1992

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 5, 2018, 6:08 p.m.

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Turro, N.J. Towards a quantitative approach to the utilization of magnetic effects as a means of isotopic enrichment, report, May 1, 1992; United States. (digital.library.unt.edu/ark:/67531/metadc1066246/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.