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The Activation Energy of Inversion in Substituted 1-Methylaziridines (N-Methylethylenimines) Measured by the Nuclear Magnetic Resonance Technique

Loewenstein, A. and Neumer, John F. and Roberts, John D. (1960) The Activation Energy of Inversion in Substituted 1-Methylaziridines (N-Methylethylenimines) Measured by the Nuclear Magnetic Resonance Technique. Journal of the American Chemical Society, 82 (14). pp. 3599-3601. ISSN 0002-7863. http://resolver.caltech.edu/CaltechAUTHORS:20151020-095613564

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Abstract

The activation energy, ΔE, and frequency factor, v_0, for inversion in l-methyl-2,2-dimethylaziridine (I) and 1-methy1-2-methyleneaziridine(II) have been measured using the n.m.r. technique. The results are ΔE = 10.0 kcal. and v_0 = 5 X 10^7 sec^(-1) for I and ΔE = 6.4 kcal and v_0 = 1 x 10^9 sec.^(-1) for II ΔE and v_0 have also been measured for solutions of I in methanol and carbon tetrachloride. The results are: ΔE = 6.8 kcal., v_0 = 2 X 10^5 sec^(-1) and ΔE = 7.8 kcal., v_0 = 1 X 10^6 sec.^(-1), respectively.


Item Type:Article
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http://dx.doi.org/10.1021/ja01499a030DOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja01499a030PublisherArticle
Additional Information:© 1960 American Chemical Society. Received September 14, 1959. Supported by the Office of Naval Research.
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Office of Naval Research (ONR)UNSPECIFIED
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Caltech Gates and Crellin Laboratories of Chemistry2498
Record Number:CaltechAUTHORS:20151020-095613564
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151020-095613564
Official Citation:The Activation Energy of Inversion in Substituted 1-Methylaziridines (N-Methylethylenimines) Measured by the Nuclear Magnetic Resonance Technique A. Loewenstein, John F. Neumer, and John D. Roberts Journal of the American Chemical Society 1960 82 (14), 3599-3601 DOI: 10.1021/ja01499a030
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61315
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:20 Oct 2015 17:34
Last Modified:20 Oct 2015 17:34

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