Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants
作者:Aurora Rodríguez-Rodríguez、Israel Carreira-Barral、Martín Regueiro-Figueroa、David Esteban-Gómez、Carlos Platas-Iglesias、Andrés de Blas、Teresa Rodríguez-Blas
DOI:10.1016/j.poly.2011.09.027
日期:2012.1
observed for the Mg(II) complexes in the solid state, while the Ca(II), Sr(II) and Ba(II) complexes are 8-, 9- and 11-coordinate, respectively. The Ca(II), Sr(II) and Ba(II) complexes show a syn conformation, with the two pendant arms of the ligand disposed on the same side of the macrocyclic mean plane. However, the Mg(II) complex with the largest ligand derived from 1,7-diaza-15-crown-5 containing benzimidazole
本文中我们报道了Mg(II),Ca(II),Sr(II)和Ba(II)与衍生自1,7-diaza-15-crown-5和1,7的双臂套索状醚的配合物的合成和结构表征-diaza-12-crown-4含有苯胺或苯并咪唑侧链。其中大多数的固态结构已通过使用单晶X射线晶体学确定。固态Mg(II)配合物的配位数为7,而Ca(II),Sr(II)和Ba(II)配合物的配位数分别为8、9和11。钙(II),锶(II)和Ba(II)配合物显示出顺构象,配体的两个侧链位于大环平均平面的同一侧。但是,具有最大的配体的Mg(II)配合物衍生自含有苯并咪唑侧基的1,7-diaza-15-crown-5 ,在固态下呈反构象。1 H和13 C NMR光谱显示该构象在乙腈溶液中保持。