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Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes

Lisa A. Asuncion ; Department of Chemistry, Syracuse University, Syracuse, New York 13244
John E. Baldwin ; Department of Chemistry, Syracuse University, Syracuse, New York 13244

Puni tekst: engleski, pdf (23 MB) str. 1421-1436 preuzimanja: 129* citiraj
APA 6th Edition
Asuncion, L.A. i Baldwin, J.E. (1996). Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes. Croatica Chemica Acta, 69 (4), 1421-1436. Preuzeto s https://hrcak.srce.hr/135980
MLA 8th Edition
Asuncion, Lisa A. i John E. Baldwin. "Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes." Croatica Chemica Acta, vol. 69, br. 4, 1996, str. 1421-1436. https://hrcak.srce.hr/135980. Citirano 08.03.2021.
Chicago 17th Edition
Asuncion, Lisa A. i John E. Baldwin. "Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes." Croatica Chemica Acta 69, br. 4 (1996): 1421-1436. https://hrcak.srce.hr/135980
Harvard
Asuncion, L.A., i Baldwin, J.E. (1996). 'Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes', Croatica Chemica Acta, 69(4), str. 1421-1436. Preuzeto s: https://hrcak.srce.hr/135980 (Datum pristupa: 08.03.2021.)
Vancouver
Asuncion LA, Baldwin JE. Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes. Croatica Chemica Acta [Internet]. 1996 [pristupljeno 08.03.2021.];69(4):1421-1436. Dostupno na: https://hrcak.srce.hr/135980
IEEE
L.A. Asuncion i J.E. Baldwin, "Beta Secondary Deuterium Kinetic Isotope Effects on the Thermal Stereomutations of 1,2-Diphenylcyclopropanes", Croatica Chemica Acta, vol.69, br. 4, str. 1421-1436, 1996. [Online]. Dostupno na: https://hrcak.srce.hr/135980. [Citirano: 08.03.2021.]

Sažetak
(+)-(1S,2S)-trans-1,2-Diphenylcyclopropane and (-)-(1R,2R)-trans- l,2-diphenyl-3,3-t2-cyclopropane at 234 °C interconvert reversibly with the corresponding enantiomers and css-1,2-diphenyl cyclopropanes. For the unlabeled trans isomer, the ratio of rate constants for one-center epimerization (k\) and two-center turnover (&12) was found to be 1.1. A small normal k^Jk-Q effect, 3% per deuterium, was observed for the rate constant for one-center epimerization (k1); a substantial normal k-^lk-Q effect, 17% per deuterium, was observed for the rate constant for two-center turnover (k^). Thus different transition structures, presumably EF and EE 1,3-diphenyltrimethylene diradicals, dominate the two sorts of stereomutations.

Hrčak ID: 135980

URI
https://hrcak.srce.hr/135980

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