3-溴-5-氯水杨醛缩2,4-二甲基苯胺铜配合物的合成及晶体结构研究

Synthesis and crystal structure of a Cu(Ⅱ) complex from 3-bromo-5-chloro-2-hydroxybenzaldehyde and 2,4-dimethylaniline

目的合成一种新Schiff碱铜配合物。方法以3-溴-5-氯水杨醛,2,4-二甲基苯胺和金属Cu(II)离子为原料合成一种新的Schiff碱金属铜配合物,用X-射线单晶衍射法对其结构进行表征。结果标题化合物属于单斜晶系,空间群P21/c,晶胞参数a=1.219 4(1)nm,b=1.221 2(1)nm,c=1.993 4(2)nm,β=94.830(1)°,V=2.957 8(5)nm3,Dc=1.659 g/cm3,Z=4,μ=3.651mm-1,F(000)=1 468,R=0.037 7,wR=0.073 7。结论该化合物由2个双齿Schiff碱配体和1个Cu(II)离子组成。中心Cu(II)离子与2个双齿Schiff碱配体的2个亚氨基N原子及2个酚氧基O原子配位,配位数为4,呈平面四方构型。

Aim To synthesize a new Schiff base Cu（Ⅱ） complex from 3-bromo-5-chloro-2-hydroxybenzaldehyde and 2,4-dimethylaniline.Methods The coordination compound was obtained by condensation reaction of 3-bromo-5-chloro-2-hydroxybenzaldehyde and 2,4-dimethylaniline with Cu（II） ion.The structure of Cu（II） complex was characterized by X-ray diffraction.Results The results show that the coordination compound crystallizes in monoclinic,space group P21/c with cell parameter of a=1.219 4（1） nm,b=1.221 2（1） nm,c=1.993 4（2） nm,β=94.830（1）°,V=2.957 8（5） nm3,Dc=1.659 g/cm3,Z=4,μ=3.651 mm-1,F（000）=1 468,R=0.037 7,wR=0.073 7.Conclusion The title complex is composed of one Cu（II） ion and two Schiff base ligands.The Cu（II） atom is fourcoordinated by two phenolic oxygen atoms and two imine nitrogen atoms from two bidentate Schiff base ligands,forming a distorted square-planar coordination geometry.