Tetraazacyclophanes by palladium-catalyzed aromatic amination. Geometrically defined, stable, high-spin diradicals

SI Hauck, KV Lakshmi, JF Hartwig

Index: Hauck, Sheila I.; Lakshmi; Hartwig, John F. Organic Letters, 1999 , vol. 1, # 13 p. 2057 - 2060

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Citation Number: 86

Abstract

Neutral tetraazacyclophanes were prepared in a one-step palladium-catalyzed amination reaction. Simple oxidation of these materials creates dication diradicals that are stable at room temperature and that are geometrically well defined. The electronic and magnetic properties of the dications were investigated by CV, UV-vis, and EPR spectroscopy. These spectral data and solution phase magnetic susceptibility measurements indicate high spin ...