IClO_2异构化反应机理及电子密度拓扑研究

Reaction Mechanisms and Topological Studies of Electron Density for IClO_2 Isomerization

利用密度泛函理论方法研究了IClO2异构化反应机理.优化得到了七种异构体,其中OIClO和IClOO还未见报道,对各异构体的热力学稳定性进行了比较.找到了异构化过程的过渡态,并通过内禀反应坐标(IRC)计算确认了各个异构体之间的相互转化关系.从量子拓扑学的角度,对典型异构化反应通道IRC途径上的各点进行了电子密度拓扑分析,讨论了反应过程中化学键的断裂、生成以及化学键的变化规律,找到了反应途径上的能量过渡态(ETS)和结构过渡态(STS).

The isomerization reactions of IClO2 were studied by density functional theory. Seven isomers were optimized and two new isomers （OIC10 and IClOO） were gained, IRC calculations were also been processed to validate the connection relationship of the isomers. From the view of topological analysis of the electronic density, the topological characters of the major critical points along the reaction pathway were analyzed, the changing rules of the chemical bonds were discussed, and the energy transition states （ETS） and structure transition states （STS） were found.