作者:Chomchai Suksai、Chaveng Pakawatchai、Thawatchai Tuntulani
DOI:10.1007/s10870-008-9482-z
日期:2009.5
The crystal structures of pyridine containing thiourea moieties as substituents, (1) and (2), have been determined. The ortho-substituted pyridine (1) crystallized in monoclinic space group P21/c with a = 16.091(3) Å, b = 11.368(2) Å, c = 7.4364(14) Å, β = 100.489(4)º, V = 1337.5(4) Å3, z = 4. In this structure an intramolecular N–H···N hydrogen bond forms a pseudo-seven-membered ring. The meta-substituted pyridine (2) crystallized in monoclinic space group P21/c with a = 14.5408(15) Å, b = 8.8508(9) Å, c = 10.7959(11) Å, β = 106.435(2)º, V = 1332.6(2) Å3, z = 4. Crystal packing revealed that compounds (1) and (2) can form dimeric structures via intermolecular H-bonding using N–H···S and N–H···N interactions, respectively. Varying the substituent position on the pyridine ring using thiourea moieties gave unique molecular aggregations in solid state structures.
我们测定了含有硫脲取代基的吡啶 (1) 和 (2) 的晶体结构。正交取代的吡啶 (1) 结晶于单斜空间群 P21/c,a = 16.091(3) Å,b = 11.368(2) Å,c = 7.在该结构中,分子内 N-H-N 氢键形成了一个假七元环。元取代吡啶 (2) 在单斜空间群 P21/c 中结晶,a = 14.5408(15) 埃,b = 8.8508(9) 埃,c = 10.7959(11) 埃,β = 106.晶体堆积显示,化合物(1)和(2)可分别通过 N-H-S 和 N-H-N 相互作用,通过分子间 H 键形成二聚体结构。利用硫脲分子改变吡啶环上的取代基位置,可在固态结构中产生独特的分子聚集。