Circular dichroism spectra of trans-chalcone epoxides
| Autor: | Attila Makó, Miklós Kubinyi, Krisztina Pál, Péter Bakó, Mihály Kállay |
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| Rok vydání: | 2007 |
| Předmět: |
Chalcone
Chemistry Organic Chemistry Absolute configuration Aromaticity Circular dichroism spectra Photochemistry Catalysis Spectral line Inorganic Chemistry Crystallography chemistry.chemical_compound Alkoxy group Singlet state Physics::Chemical Physics Physical and Theoretical Chemistry Absorption (chemistry) |
| Zdroj: | Tetrahedron: Asymmetry. 18:1521-1528 |
| ISSN: | 0957-4166 |
| DOI: | 10.1016/j.tetasy.2007.06.034 |
| Popis: | The electronic absorption and CD spectra of (−)- trans -chalcone epoxide and its derivatives with methyl and alkoxy substituents at the ortho -positions of the aromatic rings have been measured. The spectra have been assigned with help of the energies, oscillatory strengths, and rotatory strengths of the singlet transitions obtained from DFT calculations. The features of the CD spectra, indicative of the absolute configuration, are the carbonyl n–π ∗ band and two further strong bands assigned to the overlapping signals of π–π ∗ and n epoxy –π ∗ excitations. |
| Databáze: | OpenAIRE |
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