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Accurate global potential energy surface for the ground state of CH2+by extrapolation to the complete basis set limit

机译:通过外推到完整的基础设定极限,精确全球电位能表面为CH2 +的接地状态

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摘要

A full three-dimensional global potential energy surface is reported for the ground state of CH2+ by fitting accurate multireference configuration interaction energies calculated using aug-cc-pVQZ and aug-cc-pV5Z basis sets with extrapolation of the electron correlation energy to the complete basis set limit. The topographical characteristics have been compared in detail with a potential energy surface of the same type recently reported [J. Chem. Phys., 2015, 142, 124302] based on a least-squares fit to accurate high level ab initio MRCI(Q) energies, calculated using AV6Z basis set. The new three-dimensional global potential energy surface is then used in quasiclassical trajectory calculations for H(S-2) + CH+(X-1 sigma(+)) C+(P-2) + H-2(X-1 sigma(+)(g)) reaction. The integral cross sections, differential cross sections and the rate coefficients have been computed. A comparison shows that our potential energy surface can be applied to any type of dynamic study.
机译:通过使用Aug-CC-PVQZ和AUG-CC-PV5Z基础集合计算的精确多引导配置交互能量,以使用带有电子相关能量的外推到完整的基础上,为CH2 +的地面为基础+的完整三维全球电位能量表面 设置限制。 已经详细比较了地形特性,近期报道的相同类型的潜在能量表面[J. 化学。 Phys,2015,142,124302]基于最小二乘适用于准确的高水平AB Initio MRCI(Q)能量,使用AV6z基础集计算。 然后用于H(S-2)+ CH +(X-1 sigma(+))C +(P-2)+ H-2(X-1 Sigma( +)(g))反应。 已经计算了积分横截面,差分截面和速率系数。 比较表明,我们的潜在能量表面可以应用于任何类型的动态研究。

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  • 来源
    《RSC Advances》 |2018年第25期|共8页
  • 作者单位

    Liaoning Univ Dept Phys Shenyang 110036 Liaoning Peoples R China;

    Liaoning Univ Dept Phys Shenyang 110036 Liaoning Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Sch Phys &

    Elect Jinan 250014 Shandong Peoples R China;

    Liaoning Univ Dept Phys Shenyang 110036 Liaoning Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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