Abstract A series of four closely related 1,2,4-triazole-3-thione (1-4) compounds was obtained by heterocyclization of thiosemicarbazides under basic catalytic conditions. The crystal structures of the 4-alkyl-5-(substituted-phenyl)-2H-1,2,4-triazole-3(4H)-thione derivatives [4-alkyl = 4-ethyl-5-phenyl (1), 4-hexyl-5-phenyl (2), 4-hexyl-5-p-tolyl (3), and 4-ethyl-5-(2,4,6-trimethoxyphenyl) (4)] have been determined. PIXEL lattice energy calculations revealed that dispersion components make the major contributions, with the coulombic terms also contributing significantly to the total energy. Interaction energies for the inversion dimers involving N–H⋯S=C hydrogen bonds indicate a dominant contribution to packing stabilization coming from the coulombic energy component. Hirshfeld surfaces and 2D-fingerprint plots allowed us to visualize different intermolecular contacts and their relative contributions to the total surface in each compound. The comprehensive analysis of the crystal packing and the energetic features demonstrate the key role of the R 2 2 ( 8 ) supramolecular synthon of the type (···HNCS)2 in the solid state structures of these 1,2,4-triazole-3-thiones.

中文翻译：

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1,2,4-三唑-3(4H)-硫酮化合物中超分子合成子的研究。X 射线晶体结构、能量和 hirshfeld 表面分析

摘要 通过氨基硫脲在碱性催化条件下的杂环化反应，得到了一系列密切相关的4个1,2,4-三唑-3-硫酮(1-4)化合物。4-烷基-5-(取代-苯基)-2H-1,2,4-三唑-3(4H)-硫酮衍生物的晶体结构[4-烷基=4-乙基-5-苯基(1), 4-己基-5-苯基(2)、4-己基-5-对甲苯基(3)和4-乙基-5-(2,4,6-三甲氧基苯基)(4)]已被测定。PIXEL 晶格能量计算表明色散分量做出了主要贡献，而库仑项也对总能量做出了显着贡献。涉及 N–H⋯S=C 氢键的反转二聚体的相互作用能表明库仑能量分量对堆积稳定性的主要贡献。Hirshfeld 表面和 2D 指纹图使我们能够可视化不同的分子间接触及其对每种化合物总表面的相对贡献。晶体堆积和能量特征的综合分析证明了 (···HNCS)2 型 R 2 2 ( 8 ) 超分子合成子在这些 1,2,4-三唑-的固态结构中的关键作用3-硫酮。