Amplification of metal-to-metal communication in the ruthenium(IV)-ruthenium(III) mixed-valence state of binuclear β-diketonatoruthenium complexes by inserting thiophene and anthracene units into acetylene linkers
作者:Yoshimasa Hoshino、Tomoko Suzuki、Hisako Umeda
DOI:10.1016/0020-1693(95)04802-2
日期:1996.4
Two new binuclearβ-diketonatoruthenium(III) complexeslinked by bis(ethynyl)thiophene (1) and bis(ethynyl)anthracene (2) were prepared. Both the binuclearcomplexes exhibited two well-defined one-electron oxidation steps and two overlapping one-electron reduction steps in triangular-wave voltammograms in dichloromethane medium at 25°C. These reduction and oxidation steps can be assigned to the reduction
制备了两个新的由双(乙炔基)噻吩(1)和双(乙炔基)蒽(2)连接的双核β-二酮基钌(III)配合物。在25°C的二氯甲烷介质中,在三角波伏安图中,两种双核络合物均表现出两个定义明确的单电子氧化步骤和两个重叠的单电子还原步骤。这些还原和氧化步骤可以分配给中心金属的还原和氧化。第一和第二氧化步骤之间的可逆半波电势差分别为1和2分别为175和183 mV 。Ru IV -Ru III混合价态1的相称常数和2是由约10比由三个乙炔接头连接一个类似的双核配合物的因素大。