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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Theoretical Investigation of the Reactivity of Copper Atoms with Carbon Disulfide
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Theoretical Investigation of the Reactivity of Copper Atoms with Carbon Disulfide

机译:铜原子与二硫化碳反应性的理论研究

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The mechanism of the Cu + CS_2 reaction has been investigated using density functional and coupled cluster calculations. The lowest energy route on the potential energy surface corresponds to the insertion product SCuCS via the formation of intermediate coordination complexes: η~1s and η~2cs, which all lie below the energy of the reactants. Another path corresponding to the formation of a cyclic C_(2v) compound η~2ss leads to the same insertion product, but it involves a higher energy barrier (34.7 kcal/mol vs 26.9 kcal/mol with respect to the reactants at the CCSD(T) level). The dissociation of the insertion product SCuCS into the CuS and CS fragments is found to be endothermic by 43 kcal/mol (CCSD(T) level). Our results are related to experimental data obtained in low-temperature rare gas matrixes and in the gas phase.
机译:Cu + CS_2反应的机理已使用密度泛函和耦合簇计算进行了研究。势能表面上的最低能级路线通过形成中间配位化合物η〜1s和η〜2cs对应于插入产物SCuCS,它们均位于反应物的能量以下。对应于形成环状C_(2v)化合物η〜2ss的另一条路径会导致相同的插入产物,但它涉及到更高的能垒(相对于CCSD处的反应物而言为34.7 kcal / mol与26.9 kcal / mol( T)级)。发现插入产物SCuCS分解为CuS和CS片段时吸热为43 kcal / mol(CCSD(T)水平)。我们的结果与在低温稀有气体基质和气相中获得的实验数据有关。

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