Main Page
About Science
Faculty Deanship
Letter of Dean
Overview of Deanship
Vice Deans
Vice Dean
Letter of Vice-dean
Overview of Vice-deanship
Vice Dean for Graduate Studies
Letter of Vice Dean for Graduate Studies
Overview of Vice Dean of Postgraduate Studies
Research and Innovation Unit
Vice Dean for Girls Campus
Faculty Management
Letter of Managing Director-Boys Campus
Letter of Managing Director-Girls Campus
Overview of Management
Educational Affairs
Males Campus
Staff
Females Campus
Contact Us
Research
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Inner-sphere oxidation of a ternary dipicolinatochromium(III) complex involving a malonic acid co-ligand
Inner-sphere oxidation of a ternary dipicolinatochromium(III) complex involving a malonic acid co-ligand
Document Language
:
English
Abstract
:
The oxidation of a ternary complex of chromium(III), [Cr-III(DPA)(Mal)(H2O)(2)](-), involving dipicolinic acid (DPA) as primary ligand and malonic acid (Mal) as co-ligand, was investigated in aqueous acidic medium. The periodate oxidation kinetics of [Cr-III(DPA)(Mal)(H2O)(2)](-) to give Cr(VI) under pseudo-first-order conditions were studied at various pH, ionic strength and temperature values. The kinetic equation was found to be as follows: where k (6) (3.65 x 10(-3) s(-1)) represents the electron transfer reaction rate constant and K (4) (4.60 x 10(-4) mol dm(-3)) represents the dissociation constant for the reaction and K (5) (1.87 mol(-1) dm(3)) and K (6) (22.83 mol(-1) dm(3)) represent the pre-equilibrium formation constants at 30 A degrees C and I = 0.2 mol dm(-3). Hexadecyltrimethylammonium bromide (CTAB) was found to enhance the reaction rate, whereas sodium dodecyl sulfate (SDS) had no effect. The thermodynamic activation parameters were estimated, and the oxidation is proposed to proceed via an inner-sphere mechanism involving the coordination of IO4 (-) to Cr(III).
ISSN
:
0340-4285
Journal Name
:
TRANSITION METAL CHEMISTRY
Volume
:
41
Issue Number
:
6
Publishing Year
:
1437 AH
2016 AD
Article Type
:
Article
Added Date
:
Thursday, August 3, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
A Basaleh
Basaleh, A
Researcher
A Abdel-Salam
Abdel-Salam, A
Researcher
Files
File Name
Type
Description
42442.pdf
pdf
Back To Researches Page