The N–H···X Hydrogen Bonds in the Crystal Structures of (Thio)Isochromene Derivatives
作者:Yu-Jing Zhou、Mei-Mei Zhang、Xiang-Shan Wang
DOI:10.1007/s10870-012-0380-z
日期:2013.1
The 6-amino-8-(2,3-dichlorophenyl)-8,8a-dihydro-1H-isothiochromene-5,7,7(3H)- tricarbonitrile DMF solvate (1) and 6-amino-8-(2,4-dichlorophenyl)-8,8a-dihydro-1H-isochromene-5,7,7(3H)-tricarbonitrile DMF solvate (2) were synthesized and characterized by IR, 1H NMR and HRMS. The molecular structures were further confirmed by X-ray diffraction analysis. The former 1, C21H19Cl2N5OS, is monoclinic, space group P2(1)/c, a = 9.8139(3), b = 7.4629(2), c = 29.2903(9) Å, β = 96.299(1), Z = 4, V = 2132.27(11) Å3. The latter 2, C21H19Cl2N5O2, is monoclinic, space group P2(1)/c, a = 17.0495(4), b = 8.9021(2), c = 16.1718(4) Å, β = 116.668(2), Z = 4, V = 2193.39(9) Å3. It is very interesting that they are all form a inter-molecular hydrogen bond of N–H···O, linking a molecule of DMF. Another hydrogen atom on the same amino group forms a hydrogen bond of N–H···S, forming polymers in 1. However, it links adjacent molecules forming dimmers via hydrogen bond of N–H···N in 2.
6-amino-8-(2,3-dichlorophenyl)-8,8a-dihydro-1H-isothiochromene-5,7,7(3H)- tricarbonitrile DMF solvate (1) 和 6-amino-8-(2、合成了 6-amino-8-(2, 4-dichlorophenyl)-8,8a-dihydro-1H-isochromene-5,7,7(3H)-tricarbonitrile DMF solvate (2) 和 6-amino-8-(2, 4-dichlorophenyl)-8,8a-dihydro-1H-isochromene-5,7,7(3H)-tricarbonitrile DMF solvate (2)。分子结构通过 X 射线衍射分析得到进一步证实。前者 1(C21H19Cl2N5OS)为单斜晶系,空间群为 P2(1)/c,a = 9.8139(3), b = 7.4629(2), c = 29.2903(9) Å, β = 96.299(1), Z = 4, V = 2132.27(11) Å3。后一种 2,C21H19Cl2N5O2,为单斜晶系,空间群 P2(1)/c,a = 17.0495(4),b = 8.9021(2), c = 16.1718(4) Å, β = 116.668(2), Z = 4, V = 2193.39(9) Å3.非常有趣的是,它们都形成了分子间的 N-H-O 氢键,连接着一个 DMF 分子。在 1 中,同一氨基上的另一个氢原子形成 N-H-S 的氢键,形成聚合物;但在 2 中,它通过 N-H-N 的氢键连接相邻分子,形成二聚体。