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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >An Extended Multireference Study of the Singlet and Triplet States of the 9,10-didehydroanthracene Diradical
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An Extended Multireference Study of the Singlet and Triplet States of the 9,10-didehydroanthracene Diradical

机译:9,10-二德蒽蒽蒽醌的单态和三重态态的扩展多引用研究

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摘要

The 9,10-didehydroanthracene is an aromatic diradical produced by the Bergman cyclization of a benzannulated 10-membered enediyne. It is a 1,4 diradical, similar to p -benzyne. Here we study the spin state occupancy of the ground state of 9,10-didehydroanthracene by employing multireference methods (MR-CISD and MR-AQCC) with different basis sets (cc-pVDZ and cc-pVTZ) and active space sizes (CAS (2,2) through CAS (8,8)). At the CAS (8,8) MR-AQCC/cc-pVDZ level of theory, we find a two-configurational singlet ground state with an adiabatic ΔE _(ST) of 6.13 kcal/mol. Unpaired electron density populations and dominant electronic configuration interactions were used to analyze the features of the 9,10-didehydroanthracene diradical.
机译:9,10-二芳蒽蒽是由Bergman环化的苯甲施的10-元Enediyne产生的芳香。 它是一个1,4 Diradical,类似于 p-b-b-blengyne。 在这里,我们通过采用不同基础(CC-PVDZ和CC-PVTZ)和有源空间尺寸(CAS(CAS)来研究9,10-二脱羟基蒽蒽蒽蒽蒽蒽蒽蒽蒽的旋转状态占用率(CC-PVDZ和CC-PVTZ)(CAS( 2,2)通过CAS(8,8))。 在CAS(8,8)MR-AQCC / CC-PVDZ理论水平,我们发现双配置单态接地状态,其绝热δ _(ST)为6.13千卡/摩尔。 未配对的电子密度群和主要的电子配置相互作用用于分析9,10-脱邻蒽蒽的特征。

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