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Document Details
Document Type
:
Article In Journal
Document Title
:
Kinetics and mechanism of the oxidation of diaquabis(1,10-phenanthroline) iron(II) by periodate in aqueous and micellar media
Kinetics and mechanism of the oxidation of diaquabis(1,10-phenanthroline) iron(II) by periodate in aqueous and micellar media
Document Language
:
English
Abstract
:
The kinetics of oxidation of [Fe-II(phen)(2)(H2O)(2)](2+) (phen = 1,10-phenanthroline) by periodate were investigated in aqueous acidic medium at different [H+] over a temperature range of 20-40 A degrees C. The reaction was studied under pseudo-first-order conditions by taking [IO (4) (-) ] > tenfold over [Fe-II(phen)(2)(H2O) (2) (2+) ]. The reaction rate increases with increasing [H+], and the kinetics of oxidation obeyed the following rate law: The surfactant sodium dodecyl sulfate was found to enhance the rate, whereas cetyltrimethylammonium bromide had little effect. Activation parameters associated with k (2) and k (3) were calculated. An electron transfer from Fe(II) to I(VII) is identified as the rate-determining step. The I(VI) species thus generated reacts in a fast step with another Fe(II) complex.
ISSN
:
0340-4285
Journal Name
:
TRANSITION METAL CHEMISTRY
Volume
:
41
Issue Number
:
3
Publishing Year
:
1437 AH
2016 AD
Article Type
:
Article
Added Date
:
Sunday, August 13, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
H Ewais
Ewais, H
Researcher
A (Obaid
(Obaid, A
Researcher
Files
File Name
Type
Description
42586.pdf
pdf
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