One- and two-electron reduction of chromium(VI) by polyaminocarboxylatocobaltate(II) complexes and the formation of chromium(V) and chromium(IV)
作者:Isam M. A. Salih、Yousif Sulfab
DOI:10.1007/s11243-016-0024-9
日期:2016.4
showed the formation of initial reaction intermediate(s). The rate law is consistent with one-electron and concurrent two-electron transfers leading to the formation of CrV and CrIV, respectively. An inner-sphere process, at least for the first term, leading to the formation of a relatively stable CrV species is almost certain. The kinetic term showing second-order dependence on [CoIILn], most likely
摘要在伪一级条件下用 [CoIILn] 研究了 CrVI 对 CoIILn 配合物 其中 L = 乙二胺四乙酸酯 (EDTA)、二亚乙基三胺五乙酸酯 (DTPA) 或 N-(2-羟乙基) 乙二胺三乙酸酯 (HEDTA)} 的氧化动力学≫ [CrVI]。动力学表现出对[CrVI]的一级依赖性。速率常数 kobs 随 [CrVI] 浓度的增加而降低。在恒定的 [H+]、离子强度和温度下,速率定律由方程描述。(i) i$$ - \textd}}\left[ \textCr}}^\textVI}} } \right] / \textdt}} = \left\ \textk}}_ 2} \left[ \textCo}}^\textII}} \textL}}^\textn}} } \right] \text + k}}_ 3} \left[ \