Experimental and theoretical investigations on the keto–enol tautomerism of 4-substituted 3-[1-methylpyrrol-2-yl)methyl]-4,5-dihydro-1H-1,2,4-triazol-5-one derivatives
作者:Monika Pitucha、Zbigniew Karczmarzyk、Waldemar Wysocki、Agnieszka A. Kaczor、Dariusz Matosiuk
DOI:10.1016/j.molstruc.2011.03.041
日期:2011.5
possessing the carbonylgroup. In the present study we use X-ray analysis, IR spectroscopy as well as quantum chemical calculation to address the keto–enol tautomerism of 4-substituted 3-[1-methylpyrrol-2-yl)methyl]-4,5-dihydro-1 H -1,2,4-triazol-5-one derivatives with antimicrobial activity. In the gas phase and in the crystalline state all the investigated molecules exist in the keto form while in the
摘要 酮-烯醇互变异构是决定具有羰基的化合物药理活性的关键现象。在本研究中,我们使用 X 射线分析、红外光谱以及量子化学计算来解决 4-取代 3-[1-甲基吡咯-2-基)甲基]-4,5-二氢- 1 H -1,2,4-triazol-5-one 衍生物,具有抗菌活性。在气相和结晶状态下,所有研究的分子都以酮形式存在,而在氯仿溶液中,观察到少量与酮形式平衡的烯醇形式。计算结果与在 KBr 中从 X 射线分析和红外光谱获得的实验数据非常一致,但不能证实互变异构平衡在氯仿溶液中转变为烯醇形式。