## Abstract Electron spin measurement of the local Cu^++^ concentrations have been performed in different cation exchange membranes by comparison with reference frozen aqueous solutions of Cu^++^ salts. Comparison of the obtained values with the average chemical concentrations has therefore permitt
Electron spin resonance measurements of dibenzenechromium cation
β Scribed by R. Prins; F.J. Reinders
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 402 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
ESR spectra of liquid and solid solutions of Cr(C the spectr+a show a well resolved proton hyperfine H6)$ have been measured. Even in solid solution s f ructure which is explained by rotation of the Cr(C6Hd2 cation around its main axis. An analysis of the 62Cr hyperfine coupling constants indicates that the unpaired electron is in the alg (3ds2) orbital. The experimental results agree fairly well with the results of an e.xtended Hilckel MO calculation.
CHEMICAL PHYSICS LETTEPS January 1969
-H
around the x, y peak, so that BCr can be evaluated from this hyperfine structure. In the spectra no indication has been found of the axial 5%.Zr
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TheESR spectrum of the radical cation of 3-methylpentane (3-MP) in CFC12CF2Cl has been obtained. The spectrum is almost identical to that for the 2-methylbutane radical cation. From the spectral analysis it is concluded that 3-MP+ has a GT skeletal conformation and the unpaired electron is confined
Electron spin resonance (ESR) and electron nuclear double resonance (ENDOR) measurements were performed for the cation radicals obtained from the model compounds of c~-, #-, 3'and 6-tocopherol (vitamin E) by oxidizing the tocopherol precursors in an AICI3-CHaCI a solution. The proton hyperfine coupl
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