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The Electronic Structure of ScAl~+. Ground and Low-Lying Excited States

机译:ScAl〜+的电子结构。地面和低空国家

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摘要

Using semiquantitative basis sets and ab initio multireference methods, we have investigated the electronic structure of scandium aluminide cation, ScAl~+. In addition to the ground state (X~2(triangle open)), we have constructed potential energy curves for 20 more states spanning an energy range of no more than 1.5 eV. The first three states, X~2(triangle open), 1~2II, and 2~2#SIGMA#~+, are practically degenerate within the accuracy of our calcualtions. They have similar binding modes and a binding energy of about 30 kcal/mol with respect to their adiabatic fragments Sc(~2D) + Al~+(~1S). The rest of the states correlate to Sc~+(~3D or ~3F)+Al~(~2P). For all states we report bond lengths, dissociation energies, harmonic frequencies, Mulliken charges, and energy gaps.
机译:使用半定量基集和从头算多参考方法,我们研究了铝化ide阳离子ScAl〜+的电子结构。除了基态(X〜2(三角形开口))之外,我们还为20个以上的状态(不超过1.5 eV的能量范围)构造了势能曲线。前三个状态X〜2(三角形打开),1〜2II和2〜2#SIGMA#〜+实际上在我们的计算精度范围内退化。它们具有相似的结合模式,并且相对于其绝热片段Sc(〜2D)+ Al〜+(〜1S)的结合能约为30 kcal / mol。其余状态与Sc〜+(〜3D或〜3F)+ Al〜(〜2P)相关。对于所有状态,我们报告键长,离解能,谐波频率,穆里肯电荷和能隙。

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