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Structure and exchange in silicon-linked tetraradicals
Yi Liao1, Martha Baskett, Paul M Lahti
1Department of Chemistry, University of Massachusetts, Amherst, MA 01003, USA.
Chemical Communications (Cambridge, England)
|July 18, 2002
Abstract:
The EPR spectroscopy, crystallography, and magnetic susceptibility of tetrakis(N-oxyl-2,2,6,6-tetramethylpiperidin-4-yl)silane and tetrakis(4-N-tert-butyl-N-aminoxylphenyl)silane show that silicon acts as a weak intramolecular exchange linker for polynitroxides, although both tetraradicals show onset of inter-spin exchange at reduced temperatures.