Metal-nitroxyl interactions. 8. Exchange interactions in a spin-labeled copper complex (3-(N-(3-2,2,5,5-tetramethylpyrroline-1-oxyl)amido)-4,9-dimethyl-5,8- diazadodeca-4,8-diene-2,11-dione)copper(II)

Daniel L DuBois, G. R. Eaton, S. S. Eaton

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Resolved electron-electron coupling is observed in the room temperature solution EPR spectra of the spin-labeled copper complex (3-(N-(3-2,2,5,5-tetramethylpyrroline-1-oxyl)amido)-4,9-dimethyl-5,8- diazadodeca-4,8-diene-2,11-dione)-copper(II). Values of the coupling constant at room temperature vary with solvent (toluene, CH2Cl2,THF, 1:1 THF-CH2Cl2, CHCl3, pyridine, Me2SO, 1:1 toluene-acetone, and 10:1 toluene-THF), ranging from 475 G (0.0454 cm-1) in THF to 520 G (0.0496 cm-1) in Me2SO. The coupling constant is also temperature dependent with values changing from 525 G (0.0501 cm-1) at -20°C to 472 G (0.0451 cm-1) at 119°C in toluene solution.

Original languageEnglish
Pages (from-to)2624-2627
Number of pages4
JournalJournal of the American Chemical Society
Issue number10
Publication statusPublished - 1979


ASJC Scopus subject areas

  • Chemistry(all)

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