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首页> 外文期刊>Chemical Physics Letters >A gradient-corrected hybrid Hartree-Fock-density functional study of the dihydrogen-bonded phenol-borane-trimethylamine complex
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A gradient-corrected hybrid Hartree-Fock-density functional study of the dihydrogen-bonded phenol-borane-trimethylamine complex

机译:二氢键合苯酚-硼烷-三甲胺配合物的梯度校正杂化Hartree-Fock密度泛函研究

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摘要

The global minimum on B3LYP, mPW1PW91, PBE1PBE and HF/6-31++G(d,p) standard and counterpoise-corrected PESs of the phenol-boranetrimethylamine neutral dimer corresponds to an O-Hdelta+...Hdelta--B dihydrogen-bonded structure. The calculated anharmonic O-H vibrational frequency shifts upon this interaction suggest that considering the counterpoise-corrected PESs instead of the standard ones at all DFT levels of theory leads to a significantly improved agreement with the experimental data, although all DFT levels somewhat overestimate the experimentally measured (anharmonic) O-H vibrational frequency shifts. The harmonic shifts are, however, in fortuitous excellent agreement with the experiment. NBO and AIM analyses of the studied complex are carried out as well. (C) 2004 Elsevier B.V. All rights reserved.
机译:苯酚-硼烷三甲胺中性二聚体的B3LYP,mPW1PW91,PBE1PBE和HF / 6-31 ++ G(d,p)标准品和经平衡校正的PES的全局最小值对应于O-Hdelta + ... Hdelta-B二氢键结构。在这种相互作用下计算出的非谐OH振动频率偏移表明,在所有DFT理论水平上考虑平衡平衡校正的PES而不是标准的PES都会与实验数据有显着改善的一致性,尽管所有DFT水平在某种程度上都高估了实验测量值( OH振动频率偏移。然而,谐波位移与实验非常吻合。还对研究对象进行了NBO和AIM分析。 (C)2004 Elsevier B.V.保留所有权利。

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