Synthesis, structure, and radical anion of the first stable p- phosphaquinone

Shigeru Sasaki, Fumiki Murakami, Masaaki Yoshifuji

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Significant localization of the unpaired electron on the phosphorus atom of phosphasemiquinone radical anion 1·- was revealed by EPR species was generated by reduction of 1, the first stable p-phosphaquinone. Employment of the 3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene moiety was essential for the synthesis as well as the effective kinetic protection of 1.

Original languageEnglish
Pages (from-to)340-343
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number3
Publication statusPublished - 1999 Feb 1


  • EPR spectroscopy
  • Phosphaalskenes
  • Quinones
  • Radicals ions
  • Redox chemistry


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