Electrochemical Monitoring of Valence Bond Isomers Interconversion in Bipyridyl-C61 Anions
作者:Francesco Paolucci、Massimo Marcaccio、Sergio Roffia、Giorgio Orlandi、Francesco Zerbetto、Maurizio Prato、Michele Maggini、Gianfranco Scorrano
DOI:10.1021/ja00129a022
日期:1995.6
the hypothesis that triply and quadruply reduced bpy-Csub 61} undergoes facile conversion among three of its structural isomers, i.e., [5,6]-closed bpy-Csub 61}, [5,6]-open bpy-Csub 61}, and [6,6] closed bpy-Csub 61}. Substituent and/or solvent effects may effectively reverse the roles of [5,6]-closed bpy-Csub 61}, and [6,6]-closed bpy-Csub 61}. As for [5,6]-closed isomer, it is the first time
电化学、量子化学和光谱技术用于研究 bpy-Csub 61} 还原的动力学。结合数值模拟对循环伏安峰的温度和扫描速率依赖性的彻底研究清楚地表明,三阴离子和四阴离子根据相同的平行 ECE 机制经历了两种化学反应。量子化学计算表明,三种异构体在带电状态下是准等能的,并支持三倍和四倍还原的 bpy-Csub 61} 在其三种结构异构体(即 [5,6]-closed bpy)之间进行轻松转换的假设-Csub 61}, [5,6]-open bpy-Csub 61}, and [6,6] closed bpy-Csub 61}。取代基和/或溶剂效应可以有效地逆转 [5,6]-closed bpy-Csub 61} 和 [6, 6]-关闭 bpy-Csub 61}。对于[5,6]-封闭异构体,首次在观察氧化还原过程的基础上提出其存在。Csub 60} 的六个还原峰首次在纯溶剂(THF,-