Synthesis, Characterization and Crystal Structures of 2-Cyano-N′-(2-chlorobenzylidene)acetohydrazide and 2-Cyano-N′-(4-dimethylaminobenzylidene)acetohydrazide
作者:Xin Zhou、Jing-Jun Ma
DOI:10.1007/s10870-012-0372-z
日期:2012.11
Two new benzohydrazone derivatives, 2-cyano-N′-(2-chlorobenzylidene)acetohydrazide (1) and 2-cyano-N′-(4-dimethylaminobenzylidene)acetohydrazide (2), were prepared and characterized by elemental analysis, 1H and 13C NMR, and single crystal X-ray diffraction. Compound 1 crystallizes in the monoclinic space group P21/c with unit cell dimensions a = 9.925(1) Å, b = 7.045(1) Å, c = 15.117(2) Å, β = 91.479(2)°, V = 1056.7(2) Å3, Z = 4, R 1 = 0.0447, and wR 2 = 0.0930. Compound 2 crystallizes in the monoclinic space group P21/c with unit cell dimensions a = 13.714(2) Å, b = 8.938(1) Å, c = 10.883(1) Å, β = 112.628(2)°, V = 1231.3(3) Å3, Z = 4, R 1 = 0.0578, and wR 2 = 0.1122. X-ray diffraction indicated that the molecules of the compounds display trans configurations with respect to the C=N double bonds. The crystal structures of the compounds are stabilized by N–H···O hydrogen bonds and weak π···π interactions. Two new benzohydrazone derivatives, 2-cyano-N′-(2-chlorobenzylidene)acetohydrazide and 2-cyano-N′-(4-dimethylaminobenzylidene)acetohydrazide, were prepared and characterized by elemental analysis, 1H and 13C NMR, and single crystal X-ray diffraction. The molecules of the compounds display trans configurations with respect to the C=N double bonds. The crystal structures of the compounds are stabilized by N–H···O hydrogen bonds and weak π···π interactions.
两种新的苯腙衍生物,2-氰基-N′-(2-氯苄亚胺)乙酰腙(1)和2-氰基-N′-(4-二甲氨基苄亚胺)乙酰腙(2),被合成并通过元素分析、1H和13C NMR及单晶X射线衍射进行了表征。化合物1结晶于单斜晶系P21/c空间组,单元格参数为a = 9.925(1) Å,b = 7.045(1) Å,c = 15.117(2) Å,β = 91.479(2)°,V = 1056.7(2) ų,Z = 4,R1 = 0.0447,wR2 = 0.0930。化合物2结晶于单斜晶系P21/c空间组,单元格参数为a = 13.714(2) Å,b = 8.938(1) Å,c = 10.883(1) Å,β = 112.628(2)°,V = 1231.3(3) ų,Z = 4,R1 = 0.0578,wR2 = 0.1122。X射线衍射表明,这些化合物的分子在C=N双键方面呈现反式构型。化合物的晶体结构通过N–H···O氢键和弱的π···π相互作用得到稳定。