Proton tautomerism in 2-nitramino-C-nitropyridine derivatives - Experimental and quantum chemical study
作者:Paulina Sołtysiak、Bartosz Zarychta、Grzegorz Spaleniak、Krzysztof Ejsmont
DOI:10.1016/j.molstruc.2019.03.040
日期:2019.6
Abstract The structures of 2-nitramino-3-nitropyridine and 2-nitramino-5-nitropyridine have been characterized by X-ray diffraction and Density Functional Theory (DFT) studies. In the crystals, both compounds exist as the imino forms. The DFT calculations were performed in order to explore the amino-imino tautomerism of the studied compounds in the gas phase and the influence of solvent polarity on
摘要 2-硝基-3-硝基吡啶和2-硝基-5-硝基吡啶的结构已通过X 射线衍射和密度泛函理论(DFT) 研究表征。在晶体中,两种化合物均以亚氨基形式存在。进行 DFT 计算是为了探索气相中所研究化合物的氨基-亚氨基互变异构现象以及溶剂极性对互变异构平衡的影响。为研究系统的吡啶环计算的芳香性指数 (HOMA) 和核独立化学位移 (NICS) 的谐波振荡模型表明亚氨基形式的芳香性显着降低。该研究还表明,对于具有分子内氢键的系统,可以观察到更高的互变异构状态稳定性,