Rate constants for self- and cross terminations of transient radicals in solution by effect modulated electron spin resonance spectroscopy
✍ Scribed by H. Paul; C. Segaud
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 512 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
Abstract
It is shown how electron spin resonance spectroscopy with modulated radical initiation can be used to analyze by purely spectroscopic means the second‐order termination kinetics of systems containing two different kinds of radicals. The technique is applied to species generated by photoreduction of acetone in tetraethoxy silane. The bimolecular self‐ and cross reactions of \documentclass{article}\pagestyle{empty}\begin{document}${\rm (CH}_{\rm 3} {\rm CH}_{\rm 2} {\rm O)}_{\rm 3} {\rm SiO\dot CHCH}_{\rm 3} (\dot R_1 ),and,(CH_3 )_2 \dot COH(\dot R_2 )$\end{document} are found to be encounter‐controlled processes. For the cross termination the often used relation k~12~ = (4 k~1~k~2~)^1/2^ is verified experimentally.