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首页> 外文期刊>Crystal growth & design >Compression of Hydrogen-Bonded Layers in Imidazolidine-2-thione
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Compression of Hydrogen-Bonded Layers in Imidazolidine-2-thione

机译：咪唑烷-2-Thione中的氢键层的压缩

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Hydrostatic compression as well as isothermal and isochoric recrystallizations of imidazolidine-2-thione performed to 2.80 GPa lead to the compressed ambient pressure monoclinic structure. It contrasts with the rich phase diagram of analogous urea and thiourea. The exceptional stability of the imidazolidine-2-thione crystals has been connected to their symmetry being lower than those of urea and thiourea, where molecules are located on special positions under normal conditions. The strongest compression of the imidazolidine-2-thione crystals along the NH center dot center dot center dot S-bonded layers contrasts with the thermal expansion perpendicular to the layers and is inconsistent with the rule of inverse effects of pressure and temperature. The strongest compression along the bonded layers has been rationalized by their folding, reducing the volume of small voids within the layers, whereas the temperature change hardly affects these voids and H bonds.
机译：静水压缩以及等温和等温碱-2-倍硫基的再结晶，对2.80GPa进行2.80GPa导致压缩的环境压力单斜晶体结构。 它与类似尿素和硫脲的丰富相图形成鲜明对比。 咪唑烷-2-尖端晶体的特殊稳定性已与其对称性低于尿素和硫脲的对称性，其中分子在正常条件下位于特殊位置。 沿NH中心点中心点中心点S键合层的咪唑烷-2-脚晶晶体的最强压缩与垂直于层的热膨胀，并且与压力和温度的逆效应规律不一致。 沿着粘合层的最强压缩已经通过其折叠合理化，减少了层内的小空隙的体积，而温度变化几乎不影响这些空隙和H键。

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