The electronic absorption spectra of the position isomers nicotinamide and isonicotinamide, nicotinic acid, and isonicotinic acid were investigated, together with the spectra of thionicotinamide, N-methyl nicotinamide and nicotinic acid N oxide. Apparent differences in the spectra of the position is
Some calculations on the absorption and emission spectra of benzoic acid
✍ Scribed by J. Catalán; A. Macías
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2010
- Weight
- 194 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0037-9646
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✦ Synopsis
Abstract
This paper presents some calculations on the monomer and dimer of benzoic acid using optimized molecular geometries. The calculated levels and transition moments are in good agreement with experimental results and they give a good account of some particular features of the absorption and emission spectra of benzoic acid.
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This linear rclation follo\vs from the ge1ir:ral-relativistic Euler equation when the exact relativistic expression for the energy density and pressurc of a degenerate electron gas are used and the nucleon kinetic energy is neglected. The modulus of the Killing vector
## Abstract The absorption spectra of a series of polyamic acids prepared using various reaction conditions were studied using the ultraviolet (UV), visible, and near‐infrared (IR) ranges. The near‐IR proved most valuable; the amidization and imidization processes could be followed by observing the