Dynamic solvent effects in the degenerate isomerization of a hexafluoroacetone anil studied by high-pressure F-19 NMR

Ohga, Yasushi and Asano, Tsutomu and Karger, Norbert and Gross, Thomas and Lüdemann, Hans-Dietrich (1999) Dynamic solvent effects in the degenerate isomerization of a hexafluoroacetone anil studied by high-pressure F-19 NMR. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 54 (6-7). pp. 417-421. ISSN 0932-0784

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Abstract

The rate of the degenerate isomerization of N-hexafluoroisopropylidene-N',N'-dimethyl-p-phenylenediamine was measured by high-pressure F-19 NMR spectroscopy in a viscous hydrocarbon, 2,4-dicyclohexyl-2-methylpentane. Pressure-induced retardations that cannot be rationalized within the framework of the transition state theory (TST) were observed, and it was concluded that the reaction was cast into the TST-invalid nonequilibrium conditions by high pressure.

Item Type: Article
Uncontrolled Keywords: THERMAL Z/E ISOMERIZATION; NUCLEAR-MAGNETIC-RESONANCE; N-BENZYLIDENEANILINES; REACTION VOLUMES; CONFORMATIONAL ISOMERIZATION; FLUCTUATIONS; ACTIVATION; AZOBENZENES; CYCLOHEXANE; MECHANISM; high-pressure F-19 NMR; high-pressure kinetics; hexafluoroacetone anil; degenerate isomerization; dynamic solvent effect
Subjects: 500 Science > 570 Life sciences
Divisions: Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie
Depositing User: Dr. Gernot Deinzer
Date Deposited: 10 Feb 2023 09:21
Last Modified: 10 Feb 2023 09:21
URI: https://pred.uni-regensburg.de/id/eprint/49235

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