[Zn(IMI)_4](ClO_4)_2的合成与晶体结构

制备了高氯酸四咪唑合锌的单晶,用X-ray单晶面探衍射仪测定了其晶体结构。结果表明,晶体属于单斜晶系,空间群为C2/c。晶胞参数为a=1.8625(9)nm,b=0.6662(3)nmc,=1.9324(9)nm,β=115.396(5)°,晶胞体积V=2.166 0(17)nm3,计算密度Dc=1.645 g/cm3,晶胞分子数Z=4,单胞中电子数目F(000)=1 088。该化合物的分子式为Zn(IMI)4(]ClO4)2,是由4个咪唑分子直接与二价锌离子配位、高氯酸根离子结合形成的配合物。并利用差示扫描量热法(DSC)和热重-微分热重法(TG-DTG)对该配合物的热分解进行了研究。

Synthesis and crystal structure of [Zn(IMI)_4](ClO_4)_2

The single crystal of Zn(IMI)4](ClO4)2(IMI:imidazolium)was prepared,its crystal structure was determined by X-ray single crystal diffractometer.The results show that the crystal belongs to a monoclinic system with C2/c space group and cell parameters of a=1.862 5(9) nm,b=0.666 2(3) nm,c=1.932 4(9) nm,β=115.396(5) °,V=2.166 0(17) nm3,calculated density Dc=1.645 g/cm3,Z=4,F(000)= 1 088.The title compound Zn(IMI)4](ClO4)2 formed byZn(IMI)4]2+ and(ClO4)-belong to an ionic compound.The central Zn(II) ion is four-coordinated with four imidazole.The thermol decomposition of Zn(IMI)4](ClO4)2 have been experimentally studied by differential scanning calorimetry(DSC) and thermogravimetry-derivative(TG-DTG) techniques.