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

Structure and Non-isothermal Decomposition Kinetics of trans-Tetrakis (pyridine) Dichlorocobalt (Ⅱ) Monohydrate

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,α=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如为dα/dt=A·B^(-E/RT)·3/2(1-a)^(2/3).[1-(1-α)^(1/3)]^(-1);动力学补偿效应表达式为InA=0.3341E-2.715.

The crystal and molecular structure of Co(Py)4Cl-H2O have been determined from three-dimension X-ray diffraction data collected on a four-circle diffractometer. The compound crystallizes in the P21/n space group with a=0.9861(6), 6 = 1.6278(9), c=1.8878(7)nm, β = 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's and differential's methods. The possible reaction mechanism was suggested by comparision of the kinetic parameters. Its kinetic equation may be expressedas: da/dt=A·e-E/RT·3/2(1-a)2/3·[1-(1-a)1/8]-1 The mathematical expression of thekinetic compensation effect of the thermal decomposion reaction is InA=0.3841E-2.715.