Document Details

Document Type : Article In Journal 
Document Title :
Manganese(II) catalyzed periodate oxidation of a ternary dipicolinatochromium(III) complex with iminodiacetate as co-ligand: mechanistic and kinetic study
Manganese(II) catalyzed periodate oxidation of a ternary dipicolinatochromium(III) complex with iminodiacetate as co-ligand: mechanistic and kinetic study
 
Document Language : English 
Abstract : The kinetics and mechanism of the oxidation of [Cr-III(DPA)(IDA)(H2O)](-) (DPA = dipicolinate and IDA = iminodiacetate) by periodate in the presence of Mn(II) as a catalyst have been investigated. The rate of the reaction increases with increasing pH, due to the deprotonation equilibria of the complex. Addition of Mn(II) in the concentration range of (2.5-10) x 10(-6) mol dm(-3) enhanced the reaction rate; the reaction is first order with respect to both [IO4 (-)] and the Cr complex, and obeys the following rate law: Catalysis by Mn(II) is believed to be due to initial oxidation of Mn(II) to Mn(III), which acts as the oxidizing agent. It is proposed that electron transfer proceeds through an inner-sphere mechanism via coordination of IO4 (-) to Cr(III). Thermodynamic activation parameters were calculated using the transition state theory equation. 
ISSN : 0340-4285 
Journal Name : TRANSITION METAL CHEMISTRY 
Volume : 41 
Issue Number : 4 
Publishing Year : 1437 AH
2016 AD 
Article Type : Article 
Added Date : Wednesday, August 9, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
H EwaisEwais, H Researcher  
A Alyoubi,Alyoubi,, A Researcher  
A ObaidObaid, A Researcher  

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