1,3-Alternate calix[4]arene nitronyl nitroxide tetraradical and diradical: synthesis, X-ray crystallography, paramagnetic NMR spectroscopy, EPR spectroscopy, and magnetic studies

Andrzej Rajca, Maren Pink, Sumit Mukherjee, Suchada Rajca, Kausik Das

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Calix[4]arenes constrained to 1,3-alternate conformation and functionalized at the upper rim with four and two nitronyl nitroxides have been synthesized, and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings.

Original languageEnglish (US)
Pages (from-to)10731-10742
Number of pages12
JournalTetrahedron
Volume63
Issue number44
DOIs
StatePublished - Oct 29 2007

Keywords

  • Calixarene
  • Diradical
  • Magnetic properties
  • Nitroxide
  • Paramagnetic NMR spectroscopy
  • Tetraradical

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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