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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Anharmonic Quasiclassical Barrier Sampings in Trajectory Calculations and Their Influence on the Computed Product Energy Distributions
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Anharmonic Quasiclassical Barrier Sampings in Trajectory Calculations and Their Influence on the Computed Product Energy Distributions

机译:弹道计算中的非谐拟经典势垒及其对计算产物能量分布的影响

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摘要

Harmonic and anharmonic quasiclassical barrier samplings were used in classical dynamics simulations to evaluate product energ distributiosn (PEDs).The results obtained for the CH dissociation in the methanethiol cation (CH_3SH~+->CH_2SH~+ + H) show that the PEDs are changed under inclusion of anharmaonicity in the initial conditions.Both the vibrational energy content at the transition sate and the energy in the transitional modes are important to explain the differences found in the PEDs.Discrepancies between the PEDs obtained for trajectories initiated at the barrier and those initiated at the reactant were found and explained on the basis of dynamical phase space bottlenecks,which make the pahse space density not unifrom for t not=0.
机译:在经典动力学模拟中使用谐波和非谐准经典屏障采样来评估产物能分布(PED)。甲烷硫醇阳离子(CH_3SH〜+-> CH_2SH〜+ + H)中CH离解的结果表明PED发生了变化过渡状态下的振动能量含量和过渡模式下的能量对于解释PED中的差异都很重要。在障碍物起始的轨迹获得的PED与起始的轨迹获得的PED之间的差异在反应相的动态相空间瓶颈的基础上找到并解释了反应物的“相”,这使t的tah = 0时的空间相密度不一致。

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