Tert-butyl 2-pyridyl nitroxide available as a paramagnetic chelate ligand for strongly exchange-coupled metal-radical compounds

Atsushi Okazawa, Takashi Nogami, Takayuki Ishida*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Exchange coupling strength of tert-butyl 2-pyridyl nitroxide (2pyNO), used as a paramagnetic chelate ligand for strongly exchange-coupled metal-radical compounds were observed. A precursory hydroxylamine (2pyNOH) was prepared from 2-bromopyridine and 2-methyl-2-nitrosobutane via the conventional organo-lithium method. Crude 2pyNO, obtained from oxidation of 2pyNOH with Ag20, was introduced to a subsequent complexation without isolation by using a stoichiometric amount of nickel(II) and copper(II) perchlorates. The spin is polarized from the NO group onto the pyridine, leading to magnetic coupling in an intermolecular fashion. It was observed that the complexes are sufficiently stable during storage under ambient conditions for several months. The intermolecular antiferromagnetic coupling observed seems consistent with these intermolecular contacts.

Original languageEnglish
Pages (from-to)2733-2735
Number of pages3
JournalChemistry of Materials
Volume19
Issue number11
DOIs
Publication statusPublished - 2007 May 29
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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