摘要
采用直接动力学方法,对化学反应NO+OClO的反应微观机理进行了理论研究.在MP2/6-311+G(d,p)水平下优化得到了稳定点的几何构型,并进行了简谐振动频率分析.通过应用内禀反应坐标理论获得了反应的最小能量路径,能量信息的较高水平的矫正在MC-QCISD//MP2/6-311+G(d,p)水平下完成.通过采用改进正则变分过渡态理论,同时结合小曲率隧道效应等校正方法,计算了得到了NO+OClO反应的速率常数值(298~2 000 K温度范围),理论计算得到的NO+OClO反应的速率常数值与实验数据符合得非常好.
Theoretical investigations for the reaction NO+OClO are completed by means of direct dynamic methods.Geometries are optimized at the MP2/6-311+G(d,p) level,the harmonic vibration frequencies are calculated at the same level.By the intrinsic reaction coordinate theory,the minimum energy paths are obtained,and energetic informations are further refined by the MC-QCISD//MP2/6-311+G(d,p) method.Calculated rate constants of the reaction NO+OClO using improved canonical variational transition state theory together with small-curvature tunneling correction over the temperature range 298~2,000 K.Calculated rate constant value is in good agreement with the available experimental data.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2011年第6期83-85,89,共4页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(20973049)
黑龙江省教育厅科学研究基金(11551077)
哈尔滨市科技局优秀带头人基金(2011RFJGS026)
关键词
直接动力学方法
过渡态
速率常数
direct dynamics method
transition state
rate constant