离子对的电子转移反应[Fe(CN)_6]^(4-)对顺式—三溴乙醇胺双乙二胺合钴(Ⅲ)的还原作用  

ELECTRON-TRANSFER REACTION OF INO PAIRS: REDUCTION OF Cis-[Co(etaH)(en)_2]Br_3 by [Fe(CN)_6]^(4-)

作　　者：刘锡兰[1] 

机构地区：[1]四川师范学院化学系,南充63700

出　　处：《化学研究与应用》1993年第3期48-54,共7页Chemical Research and Application

摘　　要：本文通过一系列实验数据总结出下述规律:顺式—三溴乙醇胺双乙二胺合钴(Ⅲ)cis—[Co(etaH)(en)_2]Br_3与[Fe(CN)_6]^(4-)间外界电子转移反应的表观速度常数K_(ob(?)d),随溶液的pH值增大而增大,随离子强度I减小而增大和随介电常数D减小而增大。上述事实说明,配体加合质子作用、离子对水化作用和溶液静电效应。是被研究反应K_(ob(?)d)变化的主要原因。This article sumarizes the following principles from a series of experimental data:under equal conditions the apparent rate constant kobsd of the outer—sphere electron—transfer reaction beween Cis—[Co(etaH) (en)_2]Br_3 and [Fe(CN)_6]^(4-) increases with an inprease in pH of solution, it increases with the decrease in ionic strength I and it increases with the decrease of the effection in dielecric constant D.and it expounds the principle of pH,ionic strength I and dielectric constant D by using effect of protonation of ligands, aquation of ion pair and electostatic effect of sloution.

关 键 词：电子转移反应 离子对 氧化还原反应 

分 类 号：O621.254[理学—有机化学]