Thermochromism and thermal E,Z isomerizations in bianthrones
β Scribed by Tapuhi, Yitzhak; Kalisky, Ofra; Agranat, Israel
- Book ID
- 126062165
- Publisher
- American Chemical Society
- Year
- 1979
- Tongue
- English
- Weight
- 521 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0022-3263
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π SIMILAR VOLUMES
## Ab initio calculations in a variation-perturbation scheme have been carried out on the three molecules of diazene, phenyldiazene and azobenzene with a view to clarifying the Z/E isomerization mechanism. It is found that, contrary to the usual belief, the rotational isomerization mechanism shows
The thermal isomerization of vinylcyclopropane to cyclopentene was discovered in 1960 and soon recognized as the simplest known example of w x a 1,3 sigmatropic shift. Experimental observations for the parent rearrangement and for isomerizations shown by substituted systems suggest that diradical tr