scholarly journals Cinétique de la formation de la métalloporphyrine Cu(II) – hématoporphyrine IX dans l'acide acétique aqueux

1975 ◽  
Vol 53 (16) ◽  
pp. 2375-2380 ◽  
Author(s):  
Guy Paquette ◽  
Miklos Zador

The kinetics of interaction of hematoporphyrin IX with Cu(II) has been studied in an acetic acid – water solvent (50%–50% v/v). The reaction is of first order with respect to the porphyrin whereas the order with respect to copper(II) perchlorate is smaller than one. This is explained by taking into account the interaction between Cu2+ and acetic acid. The reactive species are Cu2+, CuOAc+, and free porphyrin. The mechanism of the reaction is compared to those proposed for similar systems.


2007 ◽  
Vol 52 (3) ◽  
pp. 936-940 ◽  
Author(s):  
Qinbo Wang ◽  
Linxi Hou ◽  
Youwei Cheng ◽  
Xi Li


1979 ◽  
Vol 10 (14) ◽  
Author(s):  
R. KULANDAIVEL ◽  
S. NARASIMHAN ◽  
S. SUNDARAM ◽  
N. VENKATSUBRAMANIAN




2007 ◽  
Vol 52 (3) ◽  
pp. 1025-1027 ◽  
Author(s):  
Youwei Cheng ◽  
Qinbo Wang ◽  
Lijun Wang ◽  
Xi Li




1994 ◽  
Vol 59 (5) ◽  
pp. 1077-1085
Author(s):  
Yasuhisa Ikeda ◽  
Refat M. Hassan ◽  
Moustafa M. Abd El-Fattah ◽  
Yul Y. Park ◽  
Hiroshi Tomiyasu

The kinetics of ligand substitution reactions in triglycinatovanadium(III) by EDTA and NTA as multidentate ligands were investigated at a constant ionic strength of 2.5 mol dm-3 spectrophotometrically. The substitutions were second-order reactions, first order in both reactants. Their rate could be expressed in the form r = k [V(gly)3] [EDTA(NTA)] where k = 2.62 .10-2 and 6.96 .10-2 mol-1 dm3 s-1 at 25 °C for EDTA and NTA, respectively. The results obtained at different pH indicated that [H2edta]2- and [Hnta]2- ions were the most reactive species in the substitution. Kinetic parameters have been evaluated and a tentative mechanism of the reaction has been proposed.



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