Untersuchung der cis-trans-Isomerie des Wittigschen Kohlenwasserstoffs
Investigation of the cis-trans-isomerism of the Wittig hydrocarbon
- The cis-trans-isomerism of the WITTIG hydrocarbon was investigated in solid state and solution by means of fluorescence spectroscopy. The fluorescence behavior of both isomers in 2-methyltetrahydrofurane was determined as a function of concentration, temperature, and wavelength of exciting radiation. Furthermore, irradiation experiments were undertaken with light of various wavelengths. The results obtained are in agreement with the assumption that the WITTIG hydrocarbon behaves with regard to the cis-trans-isomerism like a 1,3-butadien derivative, i.e. a thermal but no photochemical cis-trans-isomerisation can be detected. The enthalpy difference between the two isomers was estimated to ΔΗ = 250 ± 50 cal/mole. It could be shown that the fluorescence of the cis-isomer is quenched by the trans-isomer. This quenching occurs probably according to the resonance energy transfer mechanism.
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| Author: | Rolf Sartorius, Reinhard Schmidt, Hartwig KelmGND, Hans-Dieter BrauerGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-761654 |
| DOI: | https://doi.org/10.1515/znb-1976-0620 |
| ISSN: | 1865-7117 |
| ISSN: | 0932-0776 |
| Parent Title (German): | Zeitschrift für Naturforschung, B |
| Publisher: | Verlag der Zeitschrift für Naturforschung |
| Place of publication: | Tübingen |
| Document Type: | Article |
| Language: | German |
| Date of Publication (online): | 2014/06/02 |
| Year of first Publication: | 1976 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/09/22 |
| Volume: | 31 |
| Issue: | 6 |
| Page Number: | 6 |
| First Page: | 810 |
| Last Page: | 815 |
| HeBIS-PPN: | 513117784 |
| Institutes: | Biochemie, Chemie und Pharmazie / Biochemie und Chemie |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0 |
