Reversible Sm(III)/Sm(II) Redox Chemistry of an Organosamarium(III) Complex

A binuclear samarium(III) complex featuring the μ- η1η1-bound dianion of 1,4-di-tert-butyl-1,4- diazabuta-1,3-diene has been prepared which exhibits reversible redox behavior, reverting to the samarium(II) precursor when dissolved in tetrahydrofuran. The new samarium(III) complex has been characterized by 1H and 13C NMR spectral data, microanalytical data, magnetic moment measurements in solution, and an X-ray crystal structure determination. © 2005 American Chemical Society.