Kinetic studies on spontaneous ligand substitution in [Cr(S-pdtra)(H2O)]-NCS- and [Cr(edtrp)(H2O)]NCS- systems

被引：5

作者：

Kaizaki, S

Kita, P

Wisniewska, J

Sakagami, N

机构：

[1] NICHOLAS COPERNICUS UNIV,DEPT CHEM,PL-87100 TORUN,POLAND

[2] OSAKA UNIV,DEPT CHEM,OSAKA 560,JAPAN

[3] UNIV TSUKUBA,DEPT CHEM,TSUKUBA,IBARAKI 305,JAPAN

来源：

TRANSITION METAL CHEMISTRY | 1997年 / 22卷 / 03期

关键词：

Physical Chemistry; Inorganic Chemistry; Catalysis; Reaction Mechanism; Kinetic Study;

D O I：

10.1023/A:1018404222225

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics of anation of [Cr(S-pdtra)(H2O)] and [Cr(edtrp)(H2O)] complexes (S-pdtra = S-propane-1,2-diamine-N,N,N'-triacetate, edtrp = ethylenediamine-N N,N'-tripropionate) by thiocyanates and aquation of the [Cr(NCS)(S-pdtra)](-) and [Cr(NCS)(edtrp)](-) ions have been studied in aqueous HClO4 solutions. The rate laws and the activation parameters have been determined and discussed. The observed decrease in reactivity for the edtrp complexes corresponds with a changeover of the reaction mechanism from I-a to I-d for reactions of the Cr-III - S-pdtra and Cr-III - edtrp species, respectively.

引用

页码：229 / 233

页数：5

共 11 条

[1] Volume profile for substitution in labile chromium(III) complexes: Reactions of aqueous [Cr(Hedta)OH2] and [Cr(edta)](-) with thiocyanate ion [J].