## Abstract The reaction mechanism of photoisomerization of isoxazoles to oxazoles through azirine intermediates is investigated theoretically by means of __ab initio__ MO CI calculations. Azirine intermediates in __S__~1~ state [(__n__ →\*) state of the carbonyl chromophore] cause the CN bond rup
MO Study of the photochemical behavior of the imine bond
✍ Scribed by Yoshihiro Osamura; Shinichi Yamabe; Kichisuke Nishimoto
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 250 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The photoisomerization of imine compounds is studied in terms of an ab initio MO CI calculation. The potential curves of the syn‐anti isomerization via the rotation and the inversion are examined for benzaldimine. It is suggested that the photoisomerization is initiated through the rotation around the CN bond in both singlet and triplet states. The ease of the photoisomerization is found to be determined by both the conformation of phenyl ring in the ground state and the energy difference of vertically excited states between two isomers.
📜 SIMILAR VOLUMES
## Abstract __Ab initio__ complete active space self‐consistent field (CASSCF) and the second order multireference Møller‐Plesset calculations have been performed to examine the photochemical behavior of styrene upon the strong S~0~‐S~2~ electronic excitation in the low‐lying excited states. The op
186"C, which slowly transforms into a red secondary thermo transient (A,,, = 437 nm in EPA). The colorless Fluorolube glass permits observation of a broad ESR signal and the red solution shows a well structured signal. Further studies should reveal whether the thermo transient is the 1,4-alkyl/acyl
## Abstract Alkyl substituents on C~β~ of the CC double bond hinder both photodimerization of endocyclic oxa‐enones (**1**–**4**) and their photocycloaddition to olefins, and they cause a loss of regiospecificity in dimerization in unpolar solvents. The oxa‐enone **3** which like the bicyclic comp
Ab initio SCF LCAO hi0 calculations for the [ HzO.. Cl]complex have been performed. The energy of the linear hydrogen bond has been found to be.lower than the energy of the bifurcated one. The difference of the energies is about 3 kcai/mole. The calculated equilibrium distance between the oxygen and