and decomposition of H2I2O104– at 25.0 ± 0.2 °C and I= 0.25 ± 0.01 mol dm–3(Na2[SO4]) in the pH range 9.1–9.6 by the temperature-jump method. The observed relaxation times (in the range 50–200 µs, depending on concentration and pH) could be fitted to a scheme involving dimerisation reactions of H3IO62– with itself (kf), and with H2IO63–(kf′). The values (dm2 mol–1 s–1) determined by least-squares analysis
在25.0±0.2°C和I = 0.25±0.01 mol dm –3(Na 2 [SO 4 ])的pH范围9.1–9.6下,获得了H 2 I 2 O 10 4–的形成和分解的弛豫光谱。通过温度跳跃法。所观察到的弛豫时间(范围50-200微秒,这取决于浓度和pH值)可被装配到包括H的二聚化反应的方案3 IO 6 2-与其本身(ķ ˚F),并用H 2 IO 6 3-(k f ')。值(dm 2由pH依赖性的最小二乘法确定的mol –1 s –1)为:对于2H 3 IO 6 2–,k f =(1.54±0.04)×10 5;并进行H 3 IO 6 2- + H 2 IO 6 3-,ķ ˚F '⩽(6.94±0.50)×10 6。的值ķ ˚F '接近扩散控制极限。结果是根据亲核机理来解释的,在该机理中,
碘被–O–攻击,然后被消除。