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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Comparative Study of Identity Proton-Transfer Reactions between Simple Atoms or Groups by VB Methods
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Comparative Study of Identity Proton-Transfer Reactions between Simple Atoms or Groups by VB Methods

机译:用VB方法比较简单原子或原子团之间的同一性质子转移反应的比较

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Valence bond SCF calculations have been carried out on identity proton transfers of the type X-H + X~- → X~- + H-X and X-H~+ + X → X + X - H~+ for systems where X = F~-, Cl~-, Br~-, OH~-, SH~-, NH_2~-, PH_2~0, CH_3~-, SiH_3~-, OH_2, NH_3, and PH_3. A hybrid consisting of three contributing structures-reactantlike, productlike, and ionic (X~-H~+X~- or XH~+X)-gives reasonable results, though additional structures afford a slight further decrease in energy. Energies somewhat below Hartree-Fock and reasonable weights are obtained. Calculated barriers agree well with those obtained by high-level ab initio calculations with correlation. Insights into the factors determining barrier height are obtained.
机译:对于X = F〜-,Cl的系统,已经对XH + X〜-→X〜-+ HX和XH〜+ + X→X + X-H〜+类型的质子转移进行了价键SCF计算。 〜-,Br〜-,OH〜-,SH〜-,NH_2〜-,PH_2〜0,CH_3〜-,SiH_3〜-,OH_2,NH_3和PH_3。由三个有贡献的结构组成的杂化体,如反应物样,产物样和离子型(X〜-H〜+ X〜-或XH〜+ X)-给出了合理的结果,尽管额外的结构使能量进一步略有降低。获得的能量略低于Hartree-Fock,并且获得了合理的权重。所计算的壁垒与通过相关性的高级从头计算获得的壁垒非常吻合。获得了对确定势垒高度的因素的了解。

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