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首页> 外文期刊>Journal of Molecular Structure >Structural analysis of intramolecular 1,5-type O center dot center dot center dot O and S center dot center dot center dot O interactions in diethyl 2-oxo and diethyl 2-thioxo-1H benzo[d] imidazole-1,3(2H)-dicarboxylate: Experimental and theoretical study
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Structural analysis of intramolecular 1,5-type O center dot center dot center dot O and S center dot center dot center dot O interactions in diethyl 2-oxo and diethyl 2-thioxo-1H benzo[d] imidazole-1,3(2H)-dicarboxylate: Experimental and theoretical study

机译:分子内1,5型中心点中心点中心点O和S中心点中心点中心点O相互作用的结构分析,二乙基二氧基二乙基二乙基二甲基-1H苯并[D]咪唑-1,3(2h )-二羧酸盐:实验和理论研究

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摘要

Four compounds derived from 2-hydroxy and 2-mercaptobenzimidazole were synthesized and characterized by FT-IR spectroscopy, nuclear magnetic resonance and elemental analysis. Two of the resulting compounds diethyl 2-oxo-1H benzo[d]imidazole-1,3(2H)-dicarboxylate and diethyl 2-thioxo-1H benzo [d]imidazole-1,3(2H)-dicarboxylate were crystallized and analyzed by X-ray diffraction. The former presented intermolecular interactions of bidentate hydrogen-bonds and the formation of R-2(2)(10) rings via C-H center dot center dot center dot O=C, resulting in a stacking arrangement while the latter had a zig-zag arrangement due to the intermolecular aromatic interaction C-H center dot center dot center dot O=C. A computational conformational study was made to support and explain the resulting structures stabilities. Furthermore, a QTAIM analysis was performed to study the nature of the intramolecular 1,5-type O center dot center dot center dot O and S center dot center dot center dot O interactions. (C) 2020 Elsevier B.V. All rights reserved.
机译:通过FT-IR光谱,核磁共振和元素分析合成衍生自2-羟基和2-巯基苯咪唑的四种化合物。由此得到的化合物二乙基二乙基二乙基苯并[D]咪唑-1,3(2H) - 二羧酸甲酯和二乙基二甲基二苯并苯并[D]咪唑-1,3(2H) - 乳羧酸盐结晶并分析通过X射线衍射。前者呈现的二齿氢键的分子间相互作用和通过CH中心点中心点中心点O = C的R-2(2)(10)环的形成,导致堆叠装置,而后者具有Zig-Zag排列由于分子间芳香族相互作用CH中心点中心点中心点O = C.进行计算构象研究,支持并解释所得的结构稳定性。此外,进行了Qtai毒分析,研究了分子内1,5型中心点中心点中心点O和S中心点中心点中心点O相互作用的性质。 (c)2020 Elsevier B.v.保留所有权利。

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