摘要
采用Gaussian98从头算程序包,从理论上对反应CH2CN+OH→CH2CN+H2O的动力学进行了研究.反应物、产物和过渡态的几何优化分别在UMP2/6—311+G(d,p)和UB3LYP/6—311+G(d,p)水平下进行.用MP4(SDTQ)/6—311+G(d,p)和CCSD(T)/6—311G(3df,2p)方法对UMP2/6—311+G(d,p)优化的反应物、产物和过渡态进行了单点能校正,并计算出了反应在300-2100K温度范围的速率常数和谐振频率.
The Gaussian 98 ab initio calculation package is used to study the dynamics of reaction CH3CN+OH→CH2CN+H2O. Geometry optimizations of reactants, products and transition state are preformed at the UMP2/6-311q-G(d,p)and UB3LYP/6-311q-G(d,p) levels. To obtain more reliable energies, MP4 (SDTQ) /6-311 -k G (d, p) and CCSD (T)/6-311G ( 3df, 2p) singlepoint energy calculations are performed at the stable structures optimized by the UMP2 method. The rate constants in the temperature range 300-2 100 K and the harmonic frequencies are calculated.
出处
《郑州大学学报(理学版)》
CAS
2008年第4期74-77,共4页
Journal of Zhengzhou University:Natural Science Edition
基金
国家自然科学基金资助项目
编号20272054