Geometry determination of tetrasubstituted stilbenes by proton NMR spectroscopy
- Fluxá, Viviana S. Department of Chemistry, University of Fribourg, Switzerland
- Jenny, Titus A. Department of Chemistry, University of Fribourg, Switzerland
- Bochet, Christian G. Department of Chemistry, University of Fribourg, Switzerland
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16.04.2005
Published in:
- Tetrahedron Letters. - 2005, vol. 46, no. 2, p. 3793-3795
English
A simple spectroscopic method was applied to determine the geometry of tetrasubstituted alkenes. The observation of the ⁵J-coupling constants in proton NMR spectra on the ¹³C satellite signals could confirm the previous misassignment of 2,3-diphenylbutene. Hence, the (E)-isomer showed a 1.5 Hz coupling constant, whereas the (Z)-isomer showed a 1.1 Hz coupling constant. Based on this new assignment and a stereospecific preparation, we also propose a revision concerning the NMR data of 2,3-diphenyl-2,3-butanediol.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 4454
- DOI 10.1016/j.tetlet.2005.04.001
- Persistent URL
- https://folia.unifr.ch/unifr/documents/299693
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