scholarly journals Kinetic Study on Induced Electron Transfer Reaction in Pentaamminecobalt(III) Complexes of α-Hydroxy Acids by Pyridinium Fluorochromate in Micellar Medium

2011 ◽  
Vol 8 (3) ◽  
pp. 1102-1107
Author(s):  
B. Mohammed Nawaz ◽  
K. Subramani ◽  
Mansur Ahmed
Keyword(s):  
Electron Transfer ◽  
Kinetic Study ◽  
Carbonyl Compounds ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Micellar Medium ◽  
Hydroxy Acids ◽  
Uv Visible ◽  
Pyridinium Fluorochromate

Pyridinium fluorochromate (PFC) oxidation of pentaamminecobalt(III) complexes of α-hydroxy acids in micellar medium yielding nearly 100% of carbonyl compounds are ultimate products. The decrease in UV-visible absorbance at λ=502 nm for Co(III) complex corresponds to nearly 100% of the initial absorbance. The stoichiometry of unbound ligand and cobalt(III) complex is accounting for about 100% reduction at the cobalt(III) centre. The kinetic and stoichiometric results have been accounted by a suitable mechanism.

scholarly journals Mn(III)acetate-Induced Electron Transfer in Pentaammine Cobalt(III)Complexes of α-Amino Acids in Micellar Medium

2012 ◽  
Vol 9 (2) ◽  
pp. 912-917
Author(s):  
S. Udhayavani ◽  
K. Subramani
Keyword(s):  
Amino Acids ◽  
Electron Transfer ◽  
Sulphuric Acid ◽  
Carbonyl Compound ◽  
Carbonyl Compounds ◽  
Acidic Medium ◽  
Micellar Medium ◽  
Uv Visible ◽  
Experimental Findings ◽  
Catalyzed Oxidation

A micellar catalyzed oxidation of pentaamminecobalt(III) complexes of α-amino acids by Mn(III)acetate in acidic medium yielding nearly 100% Co(II) and about 100% carbonyl compounds are ultimate products. The unbound amino acids yield about 100% of carbonyl compound in presence of micelles. The effect of variation of sulphuric acid has been carried. The decrease in UV-Visible absorbance at λ=502 nm for Co(III) complex corresponds to nearly 100% of the initial absorbance. In spite of the stoichiometry of Mn(III) to unbound ligand is 2:1, the ratio of Mn(III) to cobalt(III) complex is 1:1 accounting for about 100% reduction at the cobalt(III) centre. The kinetic and stoichiometric results have been accounted. A suitable mechanism consistent with the experimental findings has been proposed by involving a radical cation intermediate.

Studies on Kinetics and Mechanism of the Oxidation of Cobalt(Iii) Bound And Unbound Alpha - Hydroxy Acids By Tetramethylammonium Chlorochromate

2015 ◽  
Vol 2 (2) ◽  
pp. 64-69
Author(s):  
Dayanandhan1.R ◽  
Subramani.K
Keyword(s):  
Electron Transfer ◽  
Hydroxy Acid ◽  
Transfer Reaction ◽  
Bond Cleavage ◽  
Electron Transfer Reaction ◽  
Kinetics And Mechanism ◽  
Hydroxy Acids ◽  
Intermediate Radical ◽  
Alpha Hydroxy Acids ◽  
Kinetics Of

The kinetics of induced electron transfer reaction has been attempted presently with Tetra Methyl Ammonium Chloro Chromate (TMACC) and pentaammine cobalt (III) complexes of α-hydroxy acid in the presence of micelles. The Tetra Methyl Ammonium Chloro Chromate (TMACC) oxidizes cobalt (III) bound and unbound α-hydroxy acids. In Tetra Methyl Ammonium Chloro Chromate (TMACC) induced electron transfer in the complex, the intermediate radical formed dissociates in a nearly synchronous C-C bond cleavage and the rest of it proceeding with C-H fission yielding cobalt (III) complex. With increase in surfactant Sodium Lauryl Ethersulphate (SLES) concentration, an increase in the rate was observed.

Electron Transfer Reaction of Ion Pairs: 1.  Surfactant Cobalt(III) Complexes by Fe(CN)64− in Microheterogeneous Media

2015 ◽  
Vol 229 (3) ◽  
Author(s):  
Karuppiah Nagaraj ◽  
Krishnan Senthil Murugan ◽  
Pilavadi Thangamuniyandi
Keyword(s):  
Electron Transfer ◽  
Kinetic Study ◽  
Transfer Reaction ◽  
Ion Pairs ◽  
Electron Transfer Reaction ◽  
Single Chain ◽  
Microheterogeneous Media

AbstractThe kinetic study of reduction of single chain surfactant octahedral cobalt(III) complexes,

Relative reactivities of dihydrophenazine and dihydrophenazonium radicals in electron-transfer to an azobenzene

1970 ◽  
Vol 48 (17) ◽  
pp. 2718-2721 ◽  
Author(s):  
Richard L. Reeves
Keyword(s):  
Electron Transfer ◽  
Sulfuric Acid ◽  
Kinetic Study ◽  
Rate Constant ◽  
Transfer Reaction ◽  
Order Rate Constant ◽  
Electron Transfer Reaction ◽  
Second Order ◽  
Aqueous Acetonitrile ◽  
Predominant Species

A kinetic study of the electron-transfer reaction between a model azobenzene and dihydrophenazonium ion-radical and dihydrophenazine was carried out in 0.2 N sulfuric acid in 50 v/v aqueous acetonitrile. The second-order rate constant for the dihydrophenazine is greater than that of the ion-radical by a factor of 104. It is shown that in solutions in which the ion-radical is the predominant species, the principal electron-transfer agent is the dihydrophenazine formed by dismutation of the radical.

A Kinetic Study of the Electron-Transfer Reaction of the Phthalimide-N-oxyl Radical (PINO) with Ferrocenes

2007 ◽  
Vol 72 (23) ◽  
pp. 8748-8754 ◽  
Author(s):  
Enrico Baciocchi ◽  
Massimo Bietti ◽  
Massimo Di Fusco ◽  
Osvaldo Lanzalunga
Keyword(s):  
Electron Transfer ◽  
Kinetic Study ◽  
Transfer Reaction ◽  
Electron Transfer Reaction
Sign in / Sign up

Export Citation Format

Share Document