1,3-Alternate calix[4]arene nitronyl nitroxide tetraradical and diradical: synthesis, X-ray crystallography, paramagnetic NMR spectroscopy, EPR spectroscopy, and magnetic studies |
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| Authors: | Andrzej Rajca Maren Pink Suchada Rajca |
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| Institution: | a Department of Chemistry, University of Nebraska, Lincoln, NE 68588-0304, USA
b Department of Chemistry, Indiana University, Bloomington, IN 47405-7102, USA |
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| Abstract: | Calix4]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 calix4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings. |
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| Keywords: | Calixarene Nitroxide Diradical Tetraradical Magnetic properties Paramagnetic NMR spectroscopy |
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