Incorporation of 2-arylhexa-1,5-diene into pentasil zeolite: A distorted 1-arylcyclohexane-l,4-diyl radical cation at room temperature

Hiroshi Ikeda, Tomonori Minegishi, Tsutomu Miyashi, Prasad S. Lakkaraju, Ronald R. Sauers, Heinz D. Roth

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Incorporation into a redox-active pentasil zeolite [(Na,H)-ZSM-5] converted 2-arylhexa-1,5-dienes (9a-c; aryl = phenyl, tolyl, anisyl) into 1-arylcyclohexane-1,4-diyl radical cations, 10a-c ̇+. The ESR spectra of 10a-c ̇+ (six lines, g = 2.0026; a = 9.0 G) indicated the presence of five essentially equivalent nuclei, indicating limited delocalization of spin and charge into the phenyl group. Sequestered in the pores of ZSM-5, the three species 10a-c ̇+ are stable at room temperature, in striking contrast to the parent radical cation in cryogenic matrices: cyclohexane-1,4-diyl radical cation is converted to cyclohexene radical cation above 90 K. The structures of radical cation 10a ̇+ (X = H) and of the unsubstituted parent were probed by density functional theory (DFT) and ab initio calculations.

Original languageEnglish (US)
Pages (from-to)2504-2511
Number of pages8
JournalJournal of Physical Chemistry B
Volume109
Issue number7
DOIs
StatePublished - Feb 24 2005

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Incorporation of 2-arylhexa-1,5-diene into pentasil zeolite: A distorted 1-arylcyclohexane-l,4-diyl radical cation at room temperature'. Together they form a unique fingerprint.

Cite this