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Acetone on silicon (001): ambiphilic molecule meets ambiphilic surface

机译:硅上的丙酮(001):歧义分子遇到歧义表面

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摘要

Using density functional theory, we report detailed reaction path calculations for the reaction of acetone with the silicon (001) surface. We identify the key reaction intermediates of dissociative adsorption and the transition states between them. This resolves the identity of the one-dimer intermediate observed in STM experiments and its role in the formation of several two-dimer-wide end products of dissociation. Key to the understanding of the dissociation mechanism is the ambiphilic character of the two reactants, that is the simultaneous expression of electrophilic and nucleophilic reactivities in both the surface and the acetone molecule.
机译:使用密度泛函理论,我们报告了丙酮与硅(001)表面反应的详细反应路径计算。我们确定了离解吸附的关键反应中间体及其之间的过渡态。这解决了在STM实验中观察到的一二聚体中间体的身份及其在解离的几种二聚体宽的最终产物形成中的作用。理解解离机理的关键是两种反应物的歧义特性,即在表面和丙酮分子中同时表达亲电子和亲核反应性。

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