## Abstract The decomposition pathways of chloromethanol have been studied by __ab initio__ calculation. Equilibriums and transition states have been optimized at the UMP2(full)/6–31G(d) level. The single point energies have been obtained at higher level of G3 (MP2). Four transition states and eigh
Unimolecular rearrangements of ethylnitrene: An exploratory theoretical study
✍ Scribed by Rita Kakkar; Vibha Walia
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 497 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The products of the rearrangement of ethylnitrene are ethylideneimine via a 1,2 hydrogen shift, N‐methyl methyleneimine via a 1,2 methyl shift, and the corresponding aziridine by cyclization. The three reactions have been studied by the semiempirical MNDO method. The charge transfer effects have been investigated. Theoretically calculated vibrational frequencies and kinetic properties have been used in calculating macroscopic thermodynamic and kinetic properties. The entropies of activation, the high pressure rate constants, k~∞~, and the high pressure Arrhenius parameters, A~∞~ and E~∞~, have been computed. The kinetic isotope effects have also been studied.
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## Abstract The deprotonation of __N__‐allylbenzimidazolium halides **9a**–**d** initially results in the formation of the __N__‐allyldibenzotetraazafulvalenes **10**. These electron‐rich olefins rearrange to give 1,1′,2′,3′‐tetraalkyl‐1′,2′‐dihydro‐2,2′‐bibenzimidazoles **13**, either by a 3‐aza‐C