| | | | | 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 | | | 葛红光;赵蔡斌;孙妩娟;史娟;郭小华 | | | 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。
【作者单位】：陕西理工学院化学与环境科学学院 陕西汉中723001
【关键词】：吡啶2,6-二甲酸;1,10-菲啰啉;微热量计;热动力学;晶体结构
【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)
【分类号】：O641.4
【DOI】：CNKI:SUN:SXGX.0.2008-02-017
【正文快照】：
有机羧酸化合物具有多种配位方式,以此为配体的过渡金属羧酸配合物具有多种多样的晶体结构。可形成1D,2D,3D等多种结构形式的单核分子、双核分子和高聚物。这类配合物在催化、磁性、发光和医药等方面具有潜在的应用价值[1,2],一直受到广泛研究。过渡金属与吡啶-2,6-二甲酸(Pyri | | |
| | |  推荐 CAJ下载  PDF下载 | | | CAJViewer7.0阅读器支持所有CNKI文件格式，AdobeReader仅支持PDF格式 | | | | Thermokinetics on the reaction of formation and crystal structure for the complex [Ni(phen)_2(H_2O)_2][Ni(PDC)_2]·7H_2O | | | GE Hong-guang;ZHAO Cai-bin;SUN Wu-juan;SHI Juan;GUO Xiao-hua(School of Chemistry & Environmental Science;Shaanxi University of Technology;Hanzhong 723001;China) | | | 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 characterized 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(H2O)2][Ni(PDC)2]·7H2O was exothermic reaction in the range of experimental temperature.The higher reaction rate was obtained at higher temperature.
【Keyword】：H2PDC;phen;microcalorimeter;thermokinetics;crystal structure |
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