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首页> 外文期刊>Structural Chemistry >The influence of halogen bonds on tautomerism: the case of 3-mercapto-1,2-azoles (pyrazoles, isoxazoles, isothiazoles)
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The influence of halogen bonds on tautomerism: the case of 3-mercapto-1,2-azoles (pyrazoles, isoxazoles, isothiazoles)

机译:卤素键对互变异构的影响:3-巯基1,2-吡咯(吡唑,异恶唑,异噻唑)

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摘要

DFT calculations at the B3LYP/6-311++G(d,p) computational level have been carried out on three tautomeric pairs of 3-mercapto-1,2-azoles (pyrazoles, isoxazoles, and isothiazoles) to study the effect of halogen bonds (XBs) on the position of the equilibrium. As halogen bond donors, we have selected Br-2, Cl-2, BrCl, ClF and BrF and compare them with HF as a hydrogen bond donor. Several linear relationships were found between binding energies of different halogen bond donors. The main conclusion of this study is that the XB inverts the tautomeric equilibrium while an HB does not.
机译:在B3LYP / 6-311 ++ G(d,p)计算水平上的DFT计算已对3个巯基1,2-唑基的互变异构对(吡唑,异恶唑和异噻唑)进行了研究,以研究卤素键(XBs)处于平衡位置。作为卤素键供体,我们选择了Br-2,Cl-2,BrCl,ClF和BrF,并将它们与作为氢键供体的HF进行比较。在不同的卤素键供体的结合能之间发现了几种线性关系。这项研究的主要结论是,XB颠倒了互变异构平衡,而HB却没有。

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