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ESR studies on solvation by using s-butyl trifluoroacetyl nitroxide probe.
- Source :
-
Research on Chemical Intermediates . 2002, Vol. 28 Issue 1, p71-78. 8p. 4 Diagrams, 1 Chart, 4 Graphs. - Publication Year :
- 2002
-
Abstract
- Stable s-butyl trifluoroacetyl nitroxide (3) has been generated in electron-transfer reaction of O-benzoyl-N-s-butylhydroxylamine (1) and trifluoroacetyl peroxide (2) in F113 (CFCl[sub 2]CF[sub 2]Cl) solution at room temperature. ESR measurement of a[sub N] and a[sub H][sup β] values for 3 in 21 solvents has been carried out at 24~ 25°C. The a[sub N] values for 3 in 12 aprotic solvents show a linear correlation with the cybotactic solvent parameters E[sub T] and Z, i.e. a[sub N] = 1.35×10-[sup 2] E[sub T]+6.84, a[sub N] = 0.78×10-[sup 2]Z+6.88. The physical significance for the slopes, slope × E[sub T] or slope × Z, the extrapolated intercepts on the a[sub N] axis are linked to the sensitivity of the nitroxide toward the solvation, the magnitude of the overall solvaton effect on the a[sub N] values, and the intrinsic a[sub N] value of 3 in the ideal gaseous state, respectively. The plots of a[sub N] versus noncybotactic solvent constants, such as dipolar moment (μ) and dielectric constant (ε), all show random cases. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOLVATION
*OXIDATION-reduction reaction
Subjects
Details
- Language :
- English
- ISSN :
- 09226168
- Volume :
- 28
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Research on Chemical Intermediates
- Publication Type :
- Academic Journal
- Accession number :
- 6810696
- Full Text :
- https://doi.org/10.1163/156856702760129528