Compared with normal and bridge-head aminium cations, the i.riethylenediamine cation is relatively stable. Its ESR specffum shows that the wo nitrogen atoms and all the protons are magnetically equivalent even at 77 K. This f&ours a symmetrical ground state rather than a dynamic equilibrium between
The radical cation of hexafluoro-1,3-butadiene: An ESR study
β Scribed by M. Shiotani; H. Kawazoe; J. Sohma
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 401 KB
- Volume
- 111
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Two distinct radical cations have been observed by ESR in a-y-irradiated solid solution of hexafluoro-1,3-butadienc in freon. INDO calculations of ESR parameters showed that they were the cisoid CC& and tiansoid (Gh) forms of the planar hesafluoroburadicne radical cation. The unpaired electron occupies a s-type orbital of a2 symmetry in Cqv and bg szmmclry in CHID_
π SIMILAR VOLUMES
Exposure of dilute solutions of CH,C=CCH3 in CCI,FCCIF2 and related solvents to ionizing radiation at 77 K produced the radical cation (CH3C=CCH3 )'. On annealing, these were initially converted into the corresponding dimer cation, c-C,( CH,
## Abstract The conversion of the cyclobutene cation radical to the 1,3βbutadiene cation radical has been studied using MINDO/3 and __ab initio__ SCF MO methods. Not only smooth electrocyclic but also stepwise, nonβelectrocyclic routes were considered. Both calculational methods agree that the pref