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Condensation of 2,4-diisopropylcarbonobis(hydrazide) bis-hydrochloride with a series of aldoses gives rise to tetrazanes that can be oxidized with potassium ferricyanide to give stable verdazyl radicals in good yield. The radicals are stable under ambient conditions, and are soluble in water and polar organic solvents. Aqueous solutions are stable over a range of both acidic and basic pH and do not...
DFT calculations were performed on the singlet and triplet states of a series of copper(I)–bis(radical) complexes. For a copper(I)–bis(iminonitroxide) complex, the results are consistent with experimental data, predicting a triplet ground state and an excited singlet at 38.7 cm−1. For two related copper(I)–bis(verdazyl) complexes, the calculations predict a triplet ground state and singlet excited...
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