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Chem. Commun., 2004, 2686 - 2688, DOI: 10.1039/b411574k

Crystallography and magnetism of radicals with hindered hydroxyl groups: 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl and 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl

Patrick Taylor and Paul M. Lahti

Radicals 1–2 form networks of OHON and OHMe(nitroxide) interactions. In 2, a frustrated network forms with insufficient N–O units to form extended chain interactions. The magnetism of 1 fits a 1-D Heisenberg model with J/k=–25 J mol–1, while 2 shows more complex exchange behaviour consistent with its disordered crystal lattice.

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