of 100 mV s−1. A RhII/RhI redox couple was observed at E°′ = 0.89 V for 3, after both TTF oxidations were completed, and at 0.51 V for 4; this is between the two TTF redox processes. The more difficult oxidation of the RhI center of 3 indicates more effective electron-withdrawing from the RhI center to the first-oxidized TTF+ group at the methine position of the β-diketonato ligand of 3+ than to the
包含在次甲基位置(3位),[Rh(cod)(H 3 CCOC S-
TTF-(MeS )3 } COCH 3)](3)或终点位置(1位),报告了[Rh(cod)(Me 3 -
TTF)COCHCOCH 3 }](4)。
β-二酮基取代位置对含
TTF的
β-二酮基
配体被3和4的1,10-
菲咯啉取代以生成[Rh(cod)(phen)] +的动力学影响以及的电
化学性质3和4,进行了调查。发现
甲醇中的二阶取代速率常数k 2几乎与取代位置无关,其中4(k 2 = 2.09×10 3 dm 3 mol -1 s -1)的反应速度几乎是3的两倍。。仅在k s = 42 s -1的4个中观察到替代机制中的可观溶剂途径。提出了两个取代反应的完整机理。CH 2中3和4的电
化学Cl 2 /0.10 mol dm -3 [N(n Bu)4 ] [B(C 6 F 5)4 ]显示出三个氧化还原过程。这些中的两个是电
化学可