Integral high-peformance liquid chromatographic-electron spin resonance spectrometer for in situ studies of thermal and photochemical free radical reactions

1981 ◽  
Vol 206 (1) ◽  
pp. 139-142 ◽  
Author(s):  
Terry Reich ◽  
Kuang S. Chen ◽  
Jeffrey K.S. Wan
Keyword(s):  
Electron Spin Resonance ◽  
Free Radical ◽  
Electron Spin ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
In Situ Studies ◽  
Spin Resonance ◽  
Liquid Chromatographic ◽  
Electron Spin Resonance Spectrometer

Cyclopolymerization. XII. Electron spin resonance studies of the free radical reactions of β-substituted diallylamines

1976 ◽  
Vol 29 (5) ◽  
pp. 995 ◽  
Author(s):  
ALJ Beckwith ◽  
DG Hawthorne ◽  
DH Solomon
Keyword(s):  
Electron Spin Resonance ◽  
Free Radical ◽  
Electron Spin ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
Spin Resonance

E.s.r. spectra, and the effects of different β-substituents on the structures and relative proportions of isomeric pyrrolidin-3-ylmethyl and piperidin-3-yl radicals formed during cyclization of N,N-diallylmethylamines, are described. The hypothetical intermediate 4-azahept-6-en-2-yl radicals undergo preferential cyclization to pyrrolidin-3-ylmethyl radicals, but the sensitivity of this process to steric and conjugative effects is shown by the tendency of intermediate radicals derived from suitable substituted diallylamines to undergo alternative cyclization to piperidin-3-yl radicals.

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