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Re-investigation of the conformational interconversion of the 1,2,3,6,7,8-hexahydropyrene cation radical by EPR, ENDOR and TRIPLE spectroscopy

✍ Scribed by Reijo Mäkelä; Mikko Vuolle

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 374 KB
Volume: 23
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260230813

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✦ Synopsis

The conformational interconversion of the 1,2,3,6,7,8-hexahydropyrene cation radical has been re-examined by EPR, ENDOR and TRIPLE spectroscopy, and the Arrhenius plot is presented for a wider temperature range than that used earlier. The EPR spectra were measured from 143 to 369 K and the ENDOR spectra from 143 to 263 K. The thermodynamic constants of the conformational interconversion of the cation radical were determined on the basis of the temperature-dependent spectra. The high-resolution spectra clearly show that there are two overlapping spectra at low temperature, and this is confirmed by simulation.

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