Ferromagnetic and antiferromagnetic intermolecular interactions of organic radicals, α-nitronyl nitroxides. II

• Kunio Awaga

  Institute for Molecular Science, Myodaiji, Okazaki 444, Japan

• Yusei Maruyama

  Institute for Molecular Science, Myodaiji, Okazaki 444, Japan

抄録

The temperature dependence of the magnetic susceptibilities and the magnetizations for the three kinds of α-nitronyl nitroxides, 2-R-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazolyl-1-oxy 3-oxide [with R=phenyl (I), 3-nitrophenyl (II), 4-nitrophenyl (III)] have been measured. It is found that the intermolecular spin interaction is ferromagnetic in the crystal of III, while it is antiferromagnetic in I or II. UV–visible absorption spectra suggests the enhancements of the π-electron delocalization and the spin polarization in III in comparison with the others. The difference in the magnetic coupling between I or II and III is interpreted based on these two effects.

収録刊行物

• The Journal of Chemical Physics

  The Journal of Chemical Physics 91 (4), 2743-2747, 1989-08-15

  AIP Publishing

キーワード

• Physical and Theoretical Chemistry
• General Physics and Astronomy

詳細情報

• CRID: 1361137043733278336
• NII論文ID: 30015659754
• DOI: 10.1063/1.456984
• ISSN: 10897690
• ISSN: 00219606
• Web Site: https://pubs.aip.org/aip/jcp/article-pdf/91/4/2743/18982525/2743_1_online.pdf
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