A kinetic study of sodium cation migration in 2,5-di-tert-butyl-1,4- benzoquinone radical anion in the presence of crown ethers as studied with high-pressure electron spin resonance

M. Kasahara, S. Yamamoto, Y. Sueishi

Research output: Contribution to journalArticle

Abstract

The effects of crown ethers were examined for the intramolecular two-site jumping rates of sodium cations in 2,5-ditert-1,4-benzoquinone ion pairs using a high-pressure electron spin resonance (ESR) technique. The activation volumes for the intramolecular migration of the sodium cation (ΔV> 1‡) and the inclusion complex of the sodium cation with crown ethers (ΔV2‡) were estimated to be -7.4 and 9.5-13.8 cm23 mol-1, respectively. Further, the reaction volumes (ΔV) for the Na+/crown-ether complex formation were determined as 15.6-17.5 cm3 mol-1 in 1,2-dimethoxyethane. Based on the results, the mechanism for intramolecular sodium cation migration in the presence of crown ethers is discussed from the perspective of volume.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalHigh Pressure Research
Volume24
Issue number2
DOIs
Publication statusPublished - Jun 1 2004

Keywords

  • Cation migration
  • Crown ether
  • High-pressure ESR
  • Kinetic study

ASJC Scopus subject areas

  • Condensed Matter Physics

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