✦ LIBER ✦
Photoformation of (Z)-Isomers in Diarylazomethines. Part IV. Direct and sensitized photoisomerization of pyridyl analogues of benzylidene-aniline and absorption spectra of their (Z)-isomers
✍ Scribed by Koko Maeda; Ernst Fischer
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- German
- Weight
- 234 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
UV irradiation of solutions of the (E)‐isomers of five (out of the possible six) monopyridyl analogues at reduced temperatures results in extensive (80–90%) conversion into the corresponding (Z)‐isomers. The process is reversible both thermally and photochemically. The (Z)‐isomers are stable at temperatures below −80°, and their absorption spectra were estimated. Biacetyl‐photosensitized (E)(Z) isomerization was observed, with (Z)‐contents of ca. 70% at the photo‐stationary state.