E.s.r. measurements on solutions of NiII containing 2,2′-bipyridine (bipy) confirm that anodic oxidation produces NiIII. The stoicheiometry and kinetics of oxidation of HN3 by [Ni(bipy)3]3+ have been investigated. Unlike the oxidations of H2O2 and Br– by this cation, with HN3 the rate varies with the concentration of HClO4 at constant ionic strength. Under conditions where specific cation effects are
在含有
2,2'-联吡啶(联
吡啶)的Ni II溶液上的静电放电测量证实,阳极氧化产生Ni III。研究了[Ni(bipy)3 ] 3+氧化HN 3的
化学计量学和动力学。不同于H的氧化2 Ò 2和Br -通过该阳离子,HN 3的速率与
高氯酸的浓度而变化4以恒定的离子强度。在消除特定阳离子效应的条件下,该速率与[H + ] –1成正比,表明hydr酸的动力学活性实体为N3 –。没有来自
镍去除联
吡啶的III缓慢氧化步骤之前发生,即使可之间形成的外球中间体配合物[
镍(联
吡啶) 3 ] 3+和N 3 - 。该系统与
水合阳离子对HN 3的氧化以及[Ni(bipy) 3 ] 3+与其他
配体的氧化进行了比较。