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

Journal Article · Wed Apr 02 04:00:00 EDT 2008 · Tetrahedron

DOI:https://doi.org/10.1016/j.tet.2007.07.051· OSTI ID:1007624

Rajca, Andrzej; Pink, Maren; Mukherjee, Sumit; Rajca, Suchada; Das, Kausik ^[1]

---

1. UNL

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 {sup 1}H NMR) spectroscopy, and magnetic studies. Such calix[4]arene tetraradicals and diradicals provide scaffolds for through-bond and through-space intramolecular exchange couplings.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: USDOE
• OSTI ID: 1007624
• Journal Information: Tetrahedron, Journal Name: Tetrahedron Journal Issue: (44) ; 10, 2007 Vol. 63; ISSN TETRAB; ISSN 0040-4020
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CALIXARENES
MAGNETIC RESONANCE
RADICALS
SYNTHESIS
X-RAY DIFFRACTION