Comprehensive Quantum Chemical Analysis of the Microwave and Infrared Spectra of Cyclopropenone.

IF 2.8 2区 化学 Q3 CHEMISTRY, PHYSICAL
Kemal Oenen, Subhasish Das, Klaus R Liedl, Guntram Rauhut
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引用次数: 0

Abstract

Rovibrational configuration interaction theory including up to sextuple excitations has been used to study, simulate, and analyze the rotational spectrum and low-lying rovibrational states of cyclopropenone. This molecule has been repeatedly discovered in space, experimentally investigated in the laboratory, and was subject to theoretical studies. However, a comprehensive ab initio study of its microwave spectrum and rovibrational transitions in the far-infrared region has not yet been provided. A line list with about 3 million rovibrational transitions has been generated, covering temperature ranges between 10 and 300 K. Furthermore, this study reports highly accurate geometrical parameters, fundamental vibrational transitions, and spectroscopic constants. All calculations rely on a multidimensional potential energy surface including up to 4-mode coupling terms being obtained from explicitly correlated coupled-cluster theory including core correlation effects and estimates for high-order excitations. The computed results were validated against available experimental data, showing excellent agreement for most properties.

环丙烯微波和红外光谱的综合量子化学分析。
利用含六重激振的旋振构型相互作用理论研究、模拟和分析了环丙烯的旋振谱和低洼旋振态。这种分子在太空中被反复发现,在实验室中被实验研究,并受到理论研究的影响。然而,尚未对其微波光谱和远红外区域的旋转振动跃迁进行全面的从头算研究。生成了一个包含约300万个旋转振动跃迁的线列表,覆盖温度范围在10到300 K之间。此外,本研究报告了高度精确的几何参数、基本振动跃迁和光谱常数。所有的计算都依赖于一个多维势能面,其中包括从显式相关耦合簇理论中获得的多达4模耦合项,包括核心相关效应和高阶激励的估计。计算结果与现有的实验数据进行了验证,对大多数性质都表现出很好的一致性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
The Journal of Physical Chemistry A
The Journal of Physical Chemistry A 化学-物理:原子、分子和化学物理
CiteScore
5.20
自引率
10.30%
发文量
922
审稿时长
1.3 months
期刊介绍: The Journal of Physical Chemistry A is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.
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