氮三乙酸根合铬(Ⅲ)与3-苯基偶氮-5-磺基水杨酸的反应动力学  

Kinetics of the Reaction of Nitrilotriacetatochromium (Ⅲ ) with 3-Pheny lazo-5-sulfo-salicylic acid

作　　者：储艳秋[1] 张华麟 

机构地区：[1]复旦大学化学系,上海200433

出　　处：《复旦学报（自然科学版）》1998年第3期271-275,共5页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金

摘　　要：pH为4．4～7．6，温度为40℃，离子强度为0．1mol·dm-3（NaClO4）条件下，研究了［Cr（NTA）（H2O）（H2O）／（OH）－］与染料3－苯基偶氮－5－磺基水杨酸（PASSA）的混配络合物的生成反应动力学．拟1级速率常数为kobs，反应符合Eigen机理．因速率常数（k1，k2）大于水交换速率（kex），故此反应可归属于交换缔合机理。The kinetics of the mixed-ligand complex formation reaction of [Cr(NTA) (H2O) (H2O)/OH ] with 3-phenylazo- 5 -sulfo-salicylic acid (PASSA ) was investigated in the pH range 4. 4~7. 6 at 40℃ and in a medium of ionic strength 0. 1 mol. dm-3(NaClO4). The pseudo-first-order rate constant is kobs. The experimental results indicated that the reaction conforms to Eigen mechanism. Because the rate constant k1,k2 values exceed the kex(the ex change rate constant of water),it is reasonable to suggest that the reaction belong to the as sociative interchange mechanism.

关 键 词：氮三乙酸 PASSA 反应动力学 偶氮染料 

分 类 号：TQ613.1[化学工程—精细化工]