| ZnL2C12的晶体结构和生成反应焓变 |
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| 引用本文： | 周惠良,张小敏.ZnL2C12的晶体结构和生成反应焓变[J].宁夏大学学报(自然科学版),2012,33(3):261-264. |
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| 作者姓名： | 周惠良 张小敏 |
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| 作者单位： | 宁夏大学化学化工学院,宁夏银川,750021 |
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| 基金项目： | 国家“973”前期预研基金资助项目(2006CB708606) |
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| 摘 要： | 在无水乙醇中，制备了ZnCl2与3，5-二甲基吡唑（L）反应的配合物，确定其组成为ZnL2C12．单晶结构分析表明，配给物中，Zn^2＋分别与2分子L中的2个N配位，同时与2个Cl配位，总配位数为4．晶体属于单斜晶系，空间点群为C2／c，α=15．040nm（16），6-8．286nm（10），c=23．890nm（3），β=95．592（2）°，Z=8．微量热法测得298．15K下ZnCl2与3，5-二甲基吡唑在无水乙醇中的溶解焓及配合物液相生成反应焓变分别为（7．397±0．011），（-33．102±0．010），（6．756±0．005）kJ／mol，并求得固相生成反应的焓变．可为对该类配合物的深入研究提供参考．
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| 关 键 词： | ZnC12 3 5-二甲基吡唑 晶体结构 微量热法 热化学 |
Crystal Structure and Enthalpy Change of Reaction Formation for ZnL2Cl2 |
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| Zhou Huiliang
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ZHANG Xiaomin.Crystal Structure and Enthalpy Change of Reaction Formation for ZnL2Cl2[J].Journal of Ningxia University(Natural Science Edition),2012,33(3):261-264. |
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| Authors: | Zhou Huiliang ZHANG Xiaomin |
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| Institution: | (School of Chemistry & Chemical Engineering,Ningxia University,Ningxia Yinchuan 750021,China) |
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| Abstract: | The solid complex of zinc chloride with 3,5-Dimethyl-1H-pyrazole(L) ZnL2Cl2 was synthesized in alcohol.The crystal structure showed that Zn2+ was coordinated by two nitrogen atoms in 3,5-Dimethyl-1H-pyrazole and two chlorine atoms.It crystallizes in a monoclinic system,space group C2/c with a= 15.0401(16) nm,b= 8.2860(10) nm,c= 23.890(3) nm,β= 95.592(2)°,Z= 8.The enthalpies of solution of zinc chloride and L in alcohol at 298.15 K and the enthalpy change of liquid-phase reaction of formation for complex ZnL2Cl2 was determined by a microcalorimetry as(7.397±0.011),(-33.102±0.010) and(6.756±0.005) kJ/mol,respectively.The enthalpy change of the solid-phase reaction of formation was obtained through a thermochemical cycle. |
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| Keywords: | zinc chloride 3 5-Dimethyl-1H-pyrazole(L) crystal structure microcalorimetric method thermochemistry |
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