摘要
由离子液体1-甲基-3-羧甲基咪唑硫酸氢盐([C6H9N2O2][HSO4])和氯化钴合成了一种新的配合物[Co(H2O)4(C6H8N2O2)2]Cl2.2H2O;采用单晶X射线衍射方法测定了配合物的晶体结构.结果表明,所合成的配合物C12H28Cl2CoN4O10属于三斜晶系,空间群P-1,a=0.66753(5)nm,b=0.91751(6)nm,c=1.80604(13)nm,α=85.618(5)°,β=83.385(5)°,γ=83.443(5)°,V=1.08934(13)nm3,Z=2,Mr=520.23,F(000)=538,Dc=1.580g.cm-3,μ(Mo-Kα)=1.088mm-1,R1=0.0861,wR2=0.2878.单晶X射线分析结果表明,在所合成的配合物中,每个1-甲基-3-羧甲基咪唑除羧基外其它原子均位于同一平面,咪唑环带正电荷,而羧基氢原子消失;即整个1-甲基-3-羧甲基咪唑分子不带电荷.总体而言,配合物的内界[Co(H2O)4(C6H8N2O2)2]2+带两个正电荷,外界游离的两个氯离子起平衡电荷作用.
A novel cobalt complex, （[C6H9N2O2][HSO4]）Cl2·2H2O, was prepared by the reaction of COC12·6H2O with ionic liquid 1-methyl 3-carboxymethyl-imidazolium hydrosulfate （[CGH9N2O2][HSO4]）. Its crystal structure was determined by means of single crystal X ray diffraction. Results show that the complex, C12 H28 C12CON4 O20, crystallizes in the triclinic systern and belongs to space group P-1,a=0.66753（5）Tim,b=0.91751（6）Tim,c=1.80604（13）nm,α=85.618（5）°,β=83.385（5）°,γ=83.443（5）°,V=1.08934（13）nm2,Z=2,Mc=520.23,F（000）=538,Dc=1.580g·cm-3,μ（Mo-Kα）=1.088mm-1,R1=0.0861,wR2=0.2878. The X-ray analytical results show that in the complex, all at- oms excluding carboxyl group o{ the ionic liquid 1-methyl-3-carboxymethyl-imidazole are loca- ted in the plane of imidazole-ring cation. Because imidazole-ring has a positive electric charge, and the carboxylic proton has been eliminated, the,molecule of ionic liquid 1-methyl-3-carboxy methylimidazole molecule is neutral. This means that the inner sphere of the complex has two positive charges, and the two extra chlorine anions are responsible for charge balance.
出处
《化学研究》
CAS
2010年第2期18-21,41,共5页
Chemical Research
