配合物[Ni(phen)_2(H_2O)_2][Ni(PDC)_2]·7H_2O的生成反应热动力学及晶体结构研究  

Thermokinetics on the reaction of formation and crystal structure for the complex [Ni(phen)_2(H_2O)_2][Ni(PDC)_2]·7H_2O

作　　者：葛红光[1] 赵蔡斌[1] 孙妩娟[1] 史娟[1] 郭小华[1] 

机构地区：[1]陕西理工学院化学与环境科学学院,陕西汉中723001

出　　处：《陕西理工学院学报（自然科学版）》2008年第2期71-74,共4页Journal of Shananxi University of Technology:Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2006B30);陕西理工学院基金资助项目(SLGQD0401)

摘　　要：在水溶液中采用NiCl2.6H2O与吡啶-2,6-二甲酸(H2PDC)和1,10-菲啰啉(phen)反应生成了配合物[Ni(phen)2(H2O)2][Ni(PDC)2].7H2O.通过元素分析和单晶X射线衍射对生成的配合物进行了表征,采用微热量计测定了液相反应的焓变。结果表明:反应生成的配合物属于三斜晶系,空间群为P1-.根据实验数据计算出了标题配合物生成反应的热动力学参数(活化焓、活化熵和活化自由能)、反应速率常数和动力学参数(表观自由能、指前因子和反应级数)。在所研究的温度范围内,配合物的生成反应为放热反应,反应温度越高,反应速率越快。The title complex [Ni（phen）2（H2O）2] [Ni（PDC）2] · 7H2O was synthesized in aqueous solution by reaction of NiCl2 · 6H2O with phen and pyridine -2,6 -dicarboxylic （H2PDC）. It was character- ized by elemental analysis and single X - ray diffraction structure determination. The enthalpy change of the reaction of formation for the title complex in liquid - phase was determined by a microcalorimeter. The results indicated that the compound crystallized in triclinic system,space group P1. Thermodynamic parameters （the activation enthalpy, the activation entropy and the activation free energy）, rate constants and kinetics parameters （the apparent activation energy, the pre - exponential constant and the reaction order） of the title reaction were calculated. The formation of the complex [ Ni （phen）2 （n2O）2 ] [ Ni （PDC）2 ] · 7H2O was exothermic reaction in the range of experimental temperature. The higher reaction rate was obtained at higher temperature.

关 键 词：吡啶2 6-二甲酸 1 10-菲哆啉 微热量计 热动力学 晶体结构 

分 类 号：O614.24[理学—无机化学]