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在恒定离子强度（μ＝０． ４０ ｍｏｌ／Ｌ）的碱性介质中，于 ２０～３５℃ 用分光光度法研究了二羟基二过碘酸合镍（ Ⅳ）配离子（ＤＤＮ）氧化乙二胺的动力学．结果表明，反应对 ＤＤＮ为一级，对乙二胺为正分数级．准一级速率常数 ｋｏｂｓ随〔ＯＨ－］增加而增加， １／ｋｏｂｓ对［ＩＯ４－］有线性关系，表明二羟基一过碘酸合镍（Ⅳ）配离子（ＤＭＮ）是氧化剂的活性物种．无盐效应未检出自由基存在，据此提出了包括ＤＤＮ和ＤＭＮ存在前期平衡和内层一步双电子转移的氧化反应机理．
In a basic medium of constant ionic strength (μ = 0. 40 mol / L), the molar ratio of ethylenediaminetetraacetic acid (DDN) was measured by spectrophotometry at 20 ~ 35 ℃. Amine kinetics. The results showed that the reaction was first order for DDN and positive fraction for ethylenediamine. The quasi-first-order rate constant kobs increases with [OH-] and 1 / kobs has a linear relationship with [IO4-], indicating that DMN is the active species of the oxidant. The existence of free radicals was not detected by the salt-free effect. Therefore, the oxidation reaction mechanism including the pre-equilibrium of DDN and DMN and the one-step double-electron transfer in the inner layer was proposed.