Kinetics of the heterobimetallic complexes formation in the reactions between chromium(III) macrocyclic species and [Fe(CN)6]4− ions

Formation of a singly bridged heterobimetallic Cr^sup III^-NC-Fe^sup II^ anation product of the cis - [Cr(cycb)(H^sub 2^O)^sub 2^]^sup 3+^ and trans - [Cr(cyca)(H^sub 2^O)^sub 2^]^sup 3+^ complexes, where cyca and cycb are meso- and rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane res...

Full description

Saved in:
Bibliographic Details
Published in:Transition metal chemistry (Weinheim) 2007-11, Vol.32 (8), p.1126-1130
Main Authors: Topolski, Adrian, Kita, Przemysław, Katafias, Anna
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Formation of a singly bridged heterobimetallic Cr^sup III^-NC-Fe^sup II^ anation product of the cis - [Cr(cycb)(H^sub 2^O)^sub 2^]^sup 3+^ and trans - [Cr(cyca)(H^sub 2^O)^sub 2^]^sup 3+^ complexes, where cyca and cycb are meso- and rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane respectively, by [Fe(CN)^sub 6^]^sup 4-^ ions is accompanied by an intensive absorbance increase within 390-470 nm due to an intermetal electron transition. A bell-shape of the pseudo-first order rate constants/pH profile observed for the reactions which have been studied under a large excess of the iron(II) complex is in accordance with the highest reactivity of the chromium(III) complexes in their monohydroxomonoaqua forms. The reaction mechanism has been discussed based on the determined rate law.[PUBLICATION ABSTRACT]
ISSN:0340-4285
1572-901X
DOI:10.1007/s11243-007-0291-6