Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5224881 | Tetrahedron | 2007 | 12 Pages |
Abstract
Calix[4]arenes constrained to 1,3-alternate conformation and functionalized at the upper rim with four and two nitronyl nitroxides have been synthesized, and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings.
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