1,3-alternate calix[4]arene nitronyl nitroxide tetraradical and diradical: synthesis, X-ray crystallography, paramagnetic NMR spectroscopy, EPR spectroscopy, and magnetic studies

TETRAHEDRON

卷:63

Article

Rajca, Andrzej¹  Pink, Maren²  Mukherjee, Surnit¹  Rajca, Suchada¹  Das, Kausik¹ 

[1] Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA

[2] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

关键词: calixarene;    nitroxide;    diradical;    tetraradical;    magnetic properties;    paramagnetic NMR spectroscopy;   

DOI  :  10.1016/j.tet.2007.07.051

来源: Elsevier

【 摘 要 】

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 H-1 NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings. (C) 2007 Elsevier Ltd. All rights reserved.

【 授权许可】

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