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化学学报
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化学学报 ›› 1994, Vol. 52 ›› Issue (2): 132-137. 上一篇    下一篇

研究论文

反式二氯四吡啶合钴(Ⅱ)水合物的结构和非等温热分解动力学

李晓燕;崔学桂;刘德信;孙宏建;李淑兰   

  1. 山东大学化学系
  • 发布日期:1994-02-15

Structure and non-isothermal decomposition kinetics of trans- tetrakis (pyridine) dichlorocobalt(Ⅱ) monohydrate

LI XIAOYAN;CUI XUEGUI;LIU DEXIN;SUN HONGJIAN;LI SHULAN   

  • Published:1994-02-15

PDF

563

被引次数

4 | 2

利用X射线四圆衍射仪测定了标题化合物的晶体结构.晶体属空间群P2~1/n,a=0.9361(6)nm,b=1.6728(9)nm,c=1.3878(7)nm,β=94.01(5)°,Z=4,以TG和DTG技术研究了化合物的热分解过程. 分别运用积分法和微分法对该化合物第一步热分解的非等温动力学数据进行分析,推断为球对称的三维扩散机理,其非等温动力学方程式为dα/dt=A·e^-^E^/^R^T·3/2(1-α)^2^/^3·[1-(1-α)^1^/^3]^-^1, 动力学补偿效应表达式为lnA=0.3341E-2.715

关键词: 吡啶 P, 氯化物, 钴络合物, 过渡金属络合物, 热重量法, 非等温动力学

The crystal and mol. structure of Co(py)4Cl2譎2O have been determine from three-dimension x-ray diffraction data collected on a four-circle diffractometer. The compound crystallizes in the P21/h space group with a = 0.9361(6), b = 1.6278(9), c = 1.3878(7) nm, b = 94.01(5)? Z = 4. The thermal decomposition process of the compound has also been studied using TG and DTG techniques under non-isothermal condition; kinetic parameters were obtained from analyses of the TG and DTG curves by integral and differential methods. The possible reaction mechanism was suggested by comparison of the kinetic parameters. Its kinetic equation may be expressed as: da/dt = A譭-E/RT?/2(1-a)2/3譡1-(1-a)1/3]-1. The math. expression of the kinetic compensation effect of the thermal decomposition reaction is 1n A = 0.3341E-2.715.

Key words: PYRIDINE P, CHLORIDE, COBALT COMPLEX, TRANSITION METAL COMPLEX

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