烟酸铬（Ⅲ）配合物的合成及其热分解脱水非等温动力学研

SYNTHFSIS AND STYDIES ON THE NON-ISOTHERMAL KINETICS OF THERMAL DEHYDRATION OF COMPLEX OF CHROMIUM(Ⅲ)WITH NICOTINIC ACID

本文报道了一种新的烟酸铬（Ⅲ）的配合物Ｃｒ＿２（ＮｉＣ）＿３Ｃｌ＿３（Ｈ＿２Ｏ）＿３·５Ｈ＿２Ｏ的合成、表征及有关性质的研究。运用Ａｃｈａｒ法￣［１］和Ｃｏａｔｓ－Ｒｅｄｆｅｒｎ法￣［２］对该配合物热分解脱水的非等温动力学过程进行了推断。

A new complex of Cr(Ⅲ),Cr_2(NiC)_3Cl_3(H_2O)_3 .5H_2O,where NiC denotes nicotinate,was prepared,its structure is assigned on the basis of IR UV TG. Carboxylate oxygen-boundchromium(Ⅲ)complex has been observed in this complex. The reactant in hot water wasanalyzed by gel filtration. The non-isothermal kinetic data were analyzed by means of theAchar method and the Coats-Redfern method.The results showed that thermal dehydrationprocess was a third order reaction. The kinetic equation can be expressed as:dα/dt=Ae￣(-E/RT)0.5(1─)￣3. The mathematical expression of the kinetic compensation effect is fond to be:lnA=0.301E-1.036.