Hydrogen and halogen bonding patterns and π–π aromatic interactions of some 6,7-disubstituted 1,3-benzothiazoles studied by X-ray diffraction and DFT calculations
作者:Helena Čičak、Marijana Đaković、Zlatko Mihalić、Gordana Pavlović、Livio Racané、Vesna Tralić-Kulenović
DOI:10.1016/j.molstruc.2010.04.005
日期:2010.6
The structures of five 6, 7-disubstituted 1, 3-benzothiazole (1, 3-benzothiazole = bta) derivatives: 6-chloro-7-nitro-bta (3), 6-iodo-7-nitro-bta (5), 6-amino-7-iodo-bta (6), 6-acetylamino-7-iodo-bta (7) and 6-amino-7-bromo-bta (8) are reported and investigated by X-ray crystallography and DFT calculations. The crystal structures of 3 and 5–8 are characterized by (i) relatively weak C—H...O/N/Br and
5个6, 7-二取代1, 3-苯并噻唑(1, 3-苯并噻唑= bta)衍生物的结构式: 6-chloro-7-nitro-bta (3), 6-iodo-7-nitro-bta (5) , 6-amino-7-iodo-bta (6), 6-acetylamino-7-iodo-bta (7) 和 6-amino-7-bromo-bta (8) 通过 X 射线晶体学和 DFT 报道和研究计算。3 和 5-8 的晶体结构的特点是(i)相对较弱的 C-H...O/N/Br 和 N-H...O/N/S 氢键,(ii)C-Cl。 ..O 和 C-I...O/N 卤素键和 Br...Br 相互作用和 (iii) pi-pi 相互作用。3、5、6 和 8 的 DFT 优化结构与相应的 X 射线分子数据非常吻合。7 的计算结构偏离了实验几何结构,因为与气相中较弱的分子内氢键相比,晶相中的分子间氢键更有利。分子静电势图用于预测