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出 处:《宁夏大学学报(自然科学版)》2012年第3期261-264,共4页Journal of Ningxia University(Natural Science Edition)
基 金:国家"973"前期预研基金资助项目(2006CB708606)
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ZnL2Cl2.单晶结构分析表明,配给物中,Zn2+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,a=15.040nm(16),b=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.The solid complex of zinc chloride with 3,5-Dimethyl-lH-pyrazole (L) ZnL2 C12 was synthesized in alcohol. The crystal structure showed that Zn2+ was coordinated by two nitrogen atoms in 3, 5- Dimethyl-lH-pyrazole and two chlorine atoms. It crystallizes in a monoclinic system, space group C2/c witha: 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 ZnL2Clz 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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