文献类型：期刊文献

中文题名：4-硝基苯胂酸合成反应的热力学计算机模拟

英文题名：Thermodynamics computational simulation of 4-nitrophenylarsonic acid synthesis

作者：吕乐[1];杨座国[1];赵颖[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2014

卷号：65

期号：9

起止页码：3317

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

语种：中文

中文关键词：4-硝基苯胂酸;计算机模拟;密度泛函理论;热力学

外文关键词：4-nitrophenylarsonic acid; computational simulation; density functional theory; thermodynamics

摘要：采用密度泛函理论中的B3LYP方法,通过计算机模拟,研究了4-硝基苯胂酸合成反应中各物质的结构。在此基础上对反应热力学进行了模拟计算,通过计算,优化了反应物与产物的几何构型与电子分布,并得到了4-硝基苯胂酸合成反应的主副反应焓变、Gibbs自由能变以及反应平衡常数。模拟计算结果表明,主反应的焓变为-15.0 kJ·mol-1,为放热反应,副反应的焓变为10.0 kJ·mol-1,为吸热反应,主反应的标准Gibbs自由能变为39.7 kJ·mol-1,而副反应的Gibbs自由能为45.2 kJ·mol-1,该反应为不可逆反应。4-硝基苯胂酸合成反应的热力学性质的计算为反应工艺条件的控制和热力学研究提供了理论指导。
The structures of the reactants and products of synthesis of 4-nitrophenylarsonic acid were studied by using the B3LYP method of density functional theory. Then the structures were optimized by computational analysis. The changes in reaction enthalpy, Gibbs free energy and equilibrium constant for the primary and side reaction were calculated and analyzed with the basic thermodynamic data obtained from vibration frequency analysis. The simulation results show that the primary reaction process is exothermic and irreversible, the enthalpy change is -15.0 kj. mol-1, the Gibbs free energy change is 39.7 kJ .mo1-1. The side reaction process is endothermic and irreversible, the enthalpy change is 10.0 kJ .mo1-1, the Gibbs flee energy change is 45.2 kJ .mo1-1. The computational studies on thermodynamics of 4-nitrophenylarsonic acid synthesis can provide the theoretical guidance to the reaction process condition control.