Crystal Structure of 2-{1-[(1-(2-Pyridinio)ethylidene)hydrazono]ethyl}pyridinium diperchlorate, the Product of Template Condensation in the Presence of Cr(III)
作者:Dušanka Radanović、Goran Kaluđerović、Santiago Gómez-Ruiz、Dušan Sladić、Maja Šumar-Ristović、Ilija Brčeski、Katarina Anđelković
DOI:10.1007/s10870-008-9443-6
日期:2009.2
In an attempt to synthesize a Cr(III) complex of 2′-[1-(2-pyridinyl)ethylidene]oxamohydrazide an azine product 2-1-[(1-(2-pyridinio)ethylidene)hydrazono]ethyl}pyridinium diperchlorate was obtained by an electrophilic acyl substitution catalyzed by Cr(III). Its structure was determined by X-ray crystal analysis and showed significant changes in comparison to the corresponding unprotonated compound. The 2-1-[(1-(2-pyridinio)ethylidene)hydrazono]ethyl}pyridinium diperchlorate crystallizes in the space group P21/n of the monoclinic crystal system with unit cell parameters a = 14.3809(3) Å, b = 24.1516(5) Å, c = 15.4471(3) Å, β = 99.930(2)°, V = 5284.74(19) Å3 and Z = 12, i.e. three molecules per asymmetric unit. In the template condensation of the 2′-[1-(2-pyridinyl)ethylidene]oxamohydrazide in presence of the chromium(III) ion the 2-1-[(1-(2-pyridinio)ethylidene)hydrazono]ethyl}pyridinium diperchlorate was obtained and characterized by NMR spectroscopy and X-ray crystallography.
在尝试合成 2′-[1-(2-吡啶基)亚乙基]草酰肼的 Cr(III) 复合物时,通过 Cr(III) 催化的亲电酰基取代反应,得到了一种叠氮产物 2-1-[(1-(2-吡啶基)亚乙基)肼]乙基}吡啶鎓二氯酸盐。通过 X 射线晶体分析确定了其结构,与相应的未质子化化合物相比,其结构发生了显著变化。2-1-[(1-(2- 吡啶基)亚乙基)肼]乙基}吡啶鎓二高氯酸盐在单斜晶系的 P21/n 空间群中结晶,单胞参数 a = 14.3809(3) Å, b = 24.1516(5) Å, c = 15.4471(3) Å, β = 99.930(2)°,V = 5284.74(19) 埃3,Z = 12,即每个不对称单元有三个分子。在 2′-[1-(2-吡啶基)亚乙基]草酰肼的模板缩合过程中,在铬(III)离子的存在下,得到了 2-1-[(1-(2-吡啶基)亚乙基)肼]乙基}吡啶鎓二氯酸盐,并通过核磁共振光谱和 X 射线晶体学进行了表征。