Analysis of intermolecular interactions in 3-(4-fluoro-3-phenoxyphenyl)-1-((4-methylpiperazin-1-yl)methyl)-1H-1,2,4-triazole-5-thiol
作者:PIYUSH PANINI、RAHUL SHUKLA、T P MOHAN、B VISHALAKSHI、DEEPAK CHOPRA
DOI:10.1007/s12039-014-0700-2
日期:2014.9
In the present study, we have prepared and structurally characterized a derivative of 1,2,4 triazoles, namely 3-(4-fluoro-3-phenoxyphenyl)-1-((4-methylpiperazin-1-yl)methyl)-1H-1,2,4-triazole-5-thiol (T-1) via single crystal X-ray diffraction. The crystal structure was observed to be stabilized by the presence of various intermolecular interactions in the crystalline solid such as O-H ⋯S, C-H ⋯F, C-H ⋯S, C-H ⋯N, C-H ⋯O, C-H ⋯π, lp⋯π and π⋯π intermolecular interactions. The interaction energy of these interactions was evaluated through PIXEL method with decomposition of the total energy into the coulombic, polarization, dispersion and repulsion contribution. The study of the nature of H-bonds with sulfur reveals that stabilization due to contribution from polarization plays a significant role. It is noteworthy that the presence of the solvent molecules in the crystal structure were observed to provide stabilization to an otherwise destabilized molecular pair (comprising of two molecules of 1,2,4 triazoles in the asymmetric unit).
本研究通过单晶 X 射线衍射法制备了一种 1,2,4-三唑衍生物,即 3-(4-氟-3-苯氧基苯基)-1-((4-甲基哌嗪-1-基)甲基)-1H-1,2,4-三唑-5-硫醇 (T-1),并对其进行了结构表征。通过观察发现,结晶固体中存在各种分子间相互作用,如 O-H ⋯S、C-H ⋯F、C-H ⋯S、C-H ⋯N、C-H ⋯O、C-H ⋯π、lp⋯π和π⋯π分子间相互作用,从而稳定了晶体结构。通过 PIXEL 方法评估了这些相互作用的能量,并将总能量分解为库仑能、极化能、色散能和斥力能。对硫的 H 键性质的研究表明,极化作用所产生的稳定作用非常重要。值得注意的是,据观察,晶体结构中溶剂分子的存在为原本不稳定的分子对(由不对称单元中的两个 1,2,4-三唑分子组成)提供了稳定性。