四种新型柔性吡啶基配合物的合成、结构及配体构象与配合物结构的关系

Syntheses,Structures of Four New Complexes Constructed by Flexible Pyridine Ligand and the Relationship Between Conformations and Structures

合成了柔性配体3-吡啶甲酸-1,2-乙二酯(3-pyridinecarboxylic acid 1,2-ethanediyl ester,pcaede),并将其分别与Co盐和Hg盐进行组装,得到4个新配合物[Co(pcaede)2Cl2.2CH3CN.H2O]n(1),[Co(pcae-de)2Cl2.H2O]n(2),[Hg(pcaede)I2]n(3)和[Hg(pcaede)Br2]n(4),对其进行了元素分析、红外光谱及X射线单晶结构分析.配合物1和2为含有孔道的一维链状结构,配合物3是1D内消旋螺旋链,配合物4则是锯齿形1D链状结构.研究结果显示,孔道中填充的溶剂分子和平衡阴离子对配合物的组装有显著的影响.此外对4个配合物中配体的构象进行了理论计算.

Four new complexes [Co（pcaede）2Cl2 2CH3CN H2O]n（1）,[Co（pcaede）2Cl2·H2O]n（2）,[Hg（pcaede）I2]n（3） and [Hg（pcaede）Br2]n（4） were prepared with a flexible ligand 3-pyridinecarboxylic acid 1,2-ethanediyl ester（pcaede） and Co/Hg salts.They were characterized by elemental analysis,IR and X-ray single-crystal diffraction.Complexes 1 and 2 both have an one-dimensional（1D） chain sturcture with channels.Complex 3 processes a 1D meso-helix sturcture,and complex 4 exhibits a 1D infinite zig-zag chain structrue.The results demonstrated that the solvent molecules filled in channels and counteranions have a significant impact on the assembly of the complexes.Moreover,theoretical calculations were carried about the conformation of the ligand in four complexes.