{"title":"Trimers formed by methyl formate with hydrogen fluoride: Structures, energetics, and infrared absorption spectra","authors":"V.P. Bulychev, M.V. Buturlimova","doi":"10.1016/j.chemphys.2024.112525","DOIUrl":null,"url":null,"abstract":"<div><div>Equilibrium nuclear configurations of three stable HCOOCH<sub>3</sub>∙∙∙(HF)<sub>2</sub> trimers are calculated in the MP2/aug-cc-pVTZ approximation with the basis set superposition error taken into account. Anharmonic values of frequencies and intensities for infrared absorption bands are computed with the help of a second-order perturbation theory. The changes in the structural and spectral parameters upon formation of trimers are examined by comparing the results obtained for the trimers with analogous parameters of dimers and isolated molecules calculated earlier in the same approximation. Cooperativity of H-bonding effects in trimers and the correlations between the intramolecular and intermolecular charge transfer, the structural and spectral changes upon formation of trimers are analyzed. The frequency and intensity values are predicted for sufficiently strong absorption bands, which can be used to detect these trimers by spectroscopic methods.</div></div>","PeriodicalId":272,"journal":{"name":"Chemical Physics","volume":"589 ","pages":"Article 112525"},"PeriodicalIF":2.0000,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Physics","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0301010424003549","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Equilibrium nuclear configurations of three stable HCOOCH3∙∙∙(HF)2 trimers are calculated in the MP2/aug-cc-pVTZ approximation with the basis set superposition error taken into account. Anharmonic values of frequencies and intensities for infrared absorption bands are computed with the help of a second-order perturbation theory. The changes in the structural and spectral parameters upon formation of trimers are examined by comparing the results obtained for the trimers with analogous parameters of dimers and isolated molecules calculated earlier in the same approximation. Cooperativity of H-bonding effects in trimers and the correlations between the intramolecular and intermolecular charge transfer, the structural and spectral changes upon formation of trimers are analyzed. The frequency and intensity values are predicted for sufficiently strong absorption bands, which can be used to detect these trimers by spectroscopic methods.
期刊介绍：
Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
