FORMATION AND DISSOCIATION KINETICS OF BIS(2,4,6-TRIPYRIDYL-S-TRIAZINE)IRON(2)

被引：33

作者：

PAGENKOPF, GK

MARGERUM, DW

机构：

[1] Department of Chemistry, Purdue University, Lafayette

来源：

INORGANIC CHEMISTRY | 1968年 / 7卷 / 12期

关键词：

D O I：

10.1021/ic50070a009

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The kinetics of formation of bis(2,4,6-tripyridyl-s-triazine)iron(II), Fe(TPTZ)22+, fit a mechanism where the addition of the first TPTZ is rate determining and the addition of the second TPTZ is much faster. The rate of dissociation of Fe- (TPTZ)22+ is determined using acid, EDTA, or base to cause the reaction. With high concentrations of these scavengers present to react either with Fe(II) or with TPTZ, the rate-determining step shifts to the removal of one TPTZ from Fe- (TPTZ)22+. One of the TPTZ ligands must dissociate completely before EDTA can react; however, EDTA does react with the mono-TPTZ complex. On the other hand, hydrogen ion (above 10−3 M) and hydroxide ion (above 10−10 M) react directly with the bis complex to accelerate the dissociation. The Fe(TPTZ)2+ complex also shows a strong kinetic prefer¬ence to react with a neutral TPTZ molecule rather than with the negatively charged EDTA ion. © 1968, American Chemical Society. All rights reserved.

引用

页码：2514 / +

页数：1

共 22 条

[1] MECHANISM OF RACEMIZATION OF COMPLEX IONS .2. KINETICS OF THE DISSOCIATION AND RACEMIZATION OF TRIS-(1,10-PHENANTHROLINE)-IRON(II) AND TRIS-(2,2'-DIPYRIDYL)-IRON(II) COMPLEXES [J].