Synthesis, crystal structure and intermolecular magnetic interactions of a new N-TEMPO-3,5-di- tert-butylsalicylaldimine radical

A new N-TEMPO-3,5-di- tert-butylsalicylaldimine radical ( 1) has been synthesized and characterized by single crystal X-ray diffraction, elemental analysis, IR, UV–vis, and EPR spectroscopy and temperature dependent magnetic susceptibility. X-ray diffraction revealed that H-atoms of γ-CH in TEMPO and CH 3 in salicylaldimine moieties, are located in close contact with the neighboring N–O radical group in crystal 1. The temperature dependence of the magnetic susceptibility ( χ m) of 1 has been fitted by the Curie–Weiss law with θ = −0.3 K within 10–300 K, suggesting the presence of a weak intermolecular antiferromagnetic interaction between radical centers at T