Invariant and Variable Supramolecular Self-Assembly in 6-Substituted Uracil Derivatives: Insights from X-ray Structures and Quantum Chemical Study
作者:Lamya H. Al-Wahaibi、Sai Ramya Sree Bysani、Samar S. Tawfik、Mohammed S. M. Abdelbaky、Santiago Garcia-Granda、Ali A. El-Emam、M. Judith Percino、Subbiah Thamotharan
DOI:10.1021/acs.cgd.0c01583
日期:2021.6.2
interactions come from H···O contacts in 1, and these contacts were reduced due to the presence of methyl substitutions in 2 and 3. This reduction is compensated by the increase of the same amount of H···H contacts in these structures. Further, the PIXEL energy and DFT calculations at the M06-2X-D3/cc-pVTZ level of theory were used to characterize the dimeric topology formed in structures of 1–3. The intermolecular
本研究开发了三种新的6-(芳硫基)尿嘧啶衍生物,即6-(苯硫基)嘧啶-2,4(1 H ,3 H )-二酮( 1 )、C 10 H 8 N 2 O 2 S;6-( p -tolylthio)pyrimidine-2,4(1 H ,3 H )-dione ( 2 ), C 11 H 10 N 2 O 2 S;和 6-(3,5-二甲基苯硫基)嘧啶-2,4(1 H ,3 H )-二酮 ( 3 ), C 12 H 12 N 2 O 2S,已经合成。这些化合物的单晶结构揭示了一个不变的分子带,其中包含交替的R 2 2 (8) 合成子,由1和3 中的N-H···O 氢键形成。这种交替的氢键模式在2 中消失了;相反,会生成一个新的合成子。晶格能计算表明,甲基取代衍生物(2和3)比化合物1具有更高的稳定能。. 静电势图揭示了羰基氧接受倾向的差异。Hirshfeld 表面和 2D 指纹图分析表明,主要的分子间相互作用来自1