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首页> 外文期刊>Journal of structural chemistry >STRUCTURE OF HETEROASSOCIATES FORMED IN THE HF-(C2H5)(2)O LIQUID SYSTEM
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STRUCTURE OF HETEROASSOCIATES FORMED IN THE HF-(C2H5)(2)O LIQUID SYSTEM

机译:HF-(C2H5)(2)O液相体系中形成的杂缔合物的结构

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摘要

The aim of this work was to determine the structure of stable heteroassociates (HAs) with the stoichiometric ratios 1:2, 2:1, and 4:1 of molecules formed in the HF-(C2H5)(2)O binary liquid system. The stretching frequencies of HF molecules found for each HA using a special procedure for processing IR spectra were compared with the calculated frequencies HF of the stable molecular complexes (HF)(m)center dot((C2H5)(2)O)(n) (m = 1, 2, 4, 8; n = 1, 2) with different topologies by the density functional method (B3LYP/6-31++G(d,p)). As a result, it was shown that the most stable (among H-bonded complexes with the same stoichiometric ratio of molecules) HAs HF center dot((C2H5)(2)O 2, (HF)(4)center dot((C2H5)(2)O)(2), and (HF)8 center dot((C2H5)(2)O)(2) formed in HF solutions in diethyl ether. All of them had a cyclic structure and a common peculiarity of structure: only one lone electron pair of the oxygen atom of the (C2H5)(2)O molecules is involved in hydrogen bonding.
机译:这项工作的目的是确定在HF-(C2H5)(2)O二元液体系统中形成的分子的化学计量比为1:2、2:1和4:1的稳定杂缔合物(HAs)的结构。使用特殊的处理红外光谱的程序为每个HA发现的HF分子的拉伸频率与稳定分子复合物(HF)(m)中心点((C2H5)(2)O)(n)的计算频率HF进行了比较通过密度泛函方法(B3LYP / 6-31 ++ G(d,p))具有不同拓扑的(m = 1,2,4,8; n = 1,2)。结果表明,最稳定的(在分子化学计量比相同的H键复合物中)具有HF中心点((C2H5)(2)O 2,(HF)(4)中心点((C2H5 )(2)O)(2)和(HF)8中心点((C2H5)(2)O)(2)在HF的乙醚溶液中形成,它们都具有环状结构并具有共同的结构特征:(C2H5)(2)O分子的氧原子中只有一个孤电子与氢键结合。

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