## Abstract AM1 calculations show that taspine has the three energyโminima along the rotationโlike nuclear displacement of the dimethylaminoethyl group. They correspond to two enantiomeric structures and a __Cs__ structure, which have nearly equal energies. The energy barrier between the enantiomer
Molecular structure and electronic spectrum of ellagic acid: Semiempirical molecular orbital calculations
โ Scribed by Tsuguo Sato; Masahiro Kataoka
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1997
- Tongue
- English
- Weight
- 194 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0022-152X
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โฆ Synopsis
Abstract
The molecular structure of ellagic acid has been optimized by using PM3 semiempirical MO method. Ellagic acid has been calculated to be planar with the molecular symmetry of C~2h~. The lactone carbonyl groups are not tilted from the molecular plane. CNDO/S MO method has been used to interpret the experimental uvโvis spectroscopic data. The results of the PM3 and CNDO/S calculations have been in good agreement with the experimental data.
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