Crystal structures and magnetic properties of Cu(II) complexes with pyrazole-substituted iminonitroxyl radicals: New trinuclear heterospin complexes

S. V. Fokin, G. V. Romanenko, Yu G. Shvedenkov, V. N. Ikorskii, S. F. Vasilevskii, E. V. Tret'yakov, V. I. Ovcharenko

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Abstract

The paper describes the crystal structures and magnetic properties of complexes of copper(II) hexafluoroacetate (Cu(hfac)2) with stable pyrazole-substituted iminonitroxyl radicals containing the pyrazole substitutuent in the second position of the 2-imidazoline cycle (L). A new group of [Cu(hfac)2]3(L)2 complexes is found, in which L performs a bidentate-bridge function due to the coordination of the imine N atoms of the pyrazole and imidazoline cycles. It is shown that in the solid complexes there are Cu2+-N=C-N-•O exchange routes with high-energy ferromagnetic interactions (∼60-100 cm-1).

Original languageEnglish
Pages (from-to)828-834
Number of pages7
JournalJournal of Structural Chemistry
Volume43
Issue number5
DOIs
Publication statusPublished - 1 Jan 2002
Externally publishedYes

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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