Abstract
Under weak base conditions, diruthenium(Ⅲ) tetrakis- N , N '-dimethylbenzamidinate (DMBA) nitrate Ru 2 (DMBA) 4 (NO 3 ) 2 was reacted with arylethyne ligands, where aryl=NAP me ( N -methyl-1, 8-naphthalimide), NAP iso ( N -isopropyl-1, 8-naphthalimide), Naphth (naphthalene) and Ant (anthracene), to afford four new compounds: trans -Ru 2 (DMBA) 4 (C 2 Ar) 2 (Ar=NAP me , 1 ; NAP iso , 2 ; Naphth, 3 ; Ant, 4 ). Molecular structures of new compounds were determined using single crystal X-ray diffraction, and the Ru-Ru bond lengths (0.245 0~0.249 1 nm) are consis-tent with the existence of a Ru-Ru single bond. These compounds are diamagnetic and were further characterized with 1 H NMR and UV-Vis-NIR spectroscopic techniques. Cyclic voltammograms of compounds 1 ~ 4 consist of two reversible one-electron processes, an oxidation and a reduction, and their potentials depend on the nature of Ar.
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