New π-electron donors: Ethanediylidene-2,2′-bis(1,3-diselenole) and ethanediylidene-2-(1,3-dithiole)-2′-(1,3-diselenole)
✍ Scribed by Zen-ichi Yoshida; Hiroshi Awaji; Toyonari Sugimoto
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 258 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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📜 SIMILAR VOLUMES
The title structure (commonly known as 2,2 0 ,5,5 0 -tetraselenafulvalene or tetraselenafulvalene), C 6 H 4 Se 4 , contains two independent molecules, one of which is planar and centrosymmetric. The other molecule has a pronounced boat conformation and no imposed crystallographic symmetry. Correspon
Abstro~t: The synthesis is described of a series of conjugated donor-~-acceptor molecules where 1,3-diselenoles are the electron donor moieties and dicyanomethylene or N-cyanoimine groups function as the acceptor moieties. Alkenes and aryl groups act as the conjugated spacers. The UV-VIS absorption
## Abstract The reaction of 2,5‐dimethyl‐3,4‐diselenocyanato‐1__H__‐pyrrole by NaBH~4~ or NaOCH~3~ led to tetraselenide **7** in quantitative yield. Treatment of protected tetraselenide **8** with LiAlH~4~ afforded the aluminum complex intermediate that was converted into pyrrole‐annelated 1,3‐dise