Theoretical investigation of the structures, stabilities and vibrational properties of triatomic interhalide ions and their alkali ion pairs

Theoretical investigation of the structures, stabilities and vibrational properties of triatomic interhalide ions and their alkali ion pairs
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三原子卤化物离子及其碱离子对的结构、稳定性和振动性质的理论研究

DOI:
10.1016/j.jfluchem.2018.10.007
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发表时间:
2018
影响因子:
1.9
通讯作者:
S. Riedel
S. Riedel
中科院分区:
化学4区
文献类型:
--
作者:
F. Redeker;A. Kropman;C. Müller;S. Zewge;H. Beckers;B. Paulus;S. Riedel

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虽然同核自由三卤化物阴离子及其碱性离子对已经在实验和理论上得到了全面的描述,但文献中对它们的异核亲属的报道仍然很零碎。这可能仅仅是因为三卤化物阴离子的可能组成种类繁多,但与制备异核三卤化物阴离子有关的实验困难,特别是那些含有最轻的卤素原子F的阴离子,也可能起到作用。本文对自由三卤化物间阴离子XXX−、XXY−、YXY−和XYZ−(X,Y,Z=F-I)及其碱离子对MXXX,MYXX,MXXY,MYXY和MXYZ(M=Li-Cs;X,Y,Z=F-Br)进行了系统的理论描述。在CCSD(T)/Triple-ζ理论水平上对计算得到的最小结构进行了分析和排序,并对其结构外观、解离能和振动性质的趋势进行了排序。关于混合碱三卤化物阴离子存在的预测和对现有实验数据的新见解可以从计算数据中得出。
While homonuclear free trihalide anions and their alkali ion pairs have been thoroughly described experimentally and theoretically, the coverage of their heteronuclear relatives in the literature remains fragmentary. This might be merely a consequence of the large variety of possible compositions of trihalide anions, however the experimental difficulties associated with the preparation of heteronuclear trihalide anions especially those containing the lightest halogen atom F could also play a role. This paper is a systematic approach to a complete theoretical description of the free inter trihalide anions XXX−, XXY−, YXY−, and XYZ−(X, Y, Z = F–I) and their alkali ion pairs MXXX, MYXX, MXXY, MYXY, and MXYZ (M = Li–Cs; X, Y, Z = F–Br). The minimum structures obtained from calculations at CCSD(T)/triple-ζ level of theory were analyzed and ordered with respect to trends in their structural appearance, dissociation energies, and vibrational properties. Predictions about the existence of mixed alkali trihalide anions and new insights about existing experimental data could be derived from calculated data.
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