氯桥联镉(Ⅱ)一维配位聚合物的合成及晶体结构研究

Synthesis and Crystal Structural Study of Cl-bridged One-dimensional Cd(Ⅱ)Complex

通过N,N-二甲基甲酰胺(L)配体与二氯化镉反应合成了一种新的一维的以氯原子为桥的桥连一维聚合物:{CdC l2[(CH3)2NCHO]2}n,并通过X射线单晶衍射对其进行了表征,配合物1属于单斜晶系,C2/c空间群,其晶胞参数为a=12.9073(14),b=13.5631(15),c=6.8759(12),α=90°,β=91.9650(10),°γ=90,°Z=4,V=1203.0(3)3,Dc=1.821g/cm3,μ=2.234mm-1,F(000)=648,R1=0.0210,wR2=0.0563.该配合物是中心对称的以氯原子为桥的一维聚合物,镉离子与分别来自2个氯原子和2个L配体的2个氧原子发生配位作用,形成一个六配位的以金属镉原子为配位中心的八面体几何构型,而且,一维聚合链之间还通过分子间的C-H…C l弱作用形成了一个二维的网状结构.

A chlorine - bridged metal - organic coordination polymer： { CdCl2 [ （ CH3 ） 2 NCHO ] 2 t, was synthesized by the reaction of N,N -dimethylformamide （L） with CdCl2 4H2O, which was characterized by X - ray crystal structural analyses, showing that this crystal structure is in monoclinic space group C2/c, and the unit cell parameter is that a=12.9073（14）,b=13.5631（15）,c=6.8759（12）,α=90°,β=91.9650（10）,°γ=90,°Z=4,V=1203.0（3）3,Dc=1.821g/cm3,μ=2.234mm-1,F（000）=648,R1=0.0210,wR2=0.0563. This complex is central- symmetry one- dimensional polymer, the environment of Co atom coordinated with four CI atoms and two 0 atoms from L ligand, forming a six - coordinated orthorhombic geometry. Moreover, one 2D network structure was formed by the intermolecular chain -to -chain weak C - H--.CI interaction.