Electron-transfer kinetics and mechanism of the reduction of octacyanometallates(IV) (M = Mo, W) by hydroxide ion in aqueous solution

1993 ◽  
Vol 18 (6) ◽  
pp. 599-603 ◽  
Author(s):  
Michail Bogdanov ◽  
Ryszard Gryboś ◽  
Alina Samotus ◽  
Konstantin Bogolitsyn
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Kinetics And Mechanism ◽  
Hydroxide Ion ◽  
Electron Transfer Kinetics

Kinetics and mechanism of phenoxide anions addition to 4-nitrobenzofurazan in aqueous solution

2017 ◽  
Vol 95 (7) ◽  
pp. 723-728 ◽  
Author(s):  
S. Ben Salah ◽  
T. Boubaker ◽  
R. Goumont
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Rate Constants ◽  
Second Order ◽  
Kinetics And Mechanism ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Hydroxide Ion ◽  
Order Rate

Second-order rate constants (k1) for the σ-complexation of 4-nitrobenzofurazan 1 with four 4-X-substituted phenoxide anions 2a–2d (X = OCH3, CH3, H and Cl) were measured in aqueous solution at 20 °C. Using this series of phenoxide anions as a reference, the electrophilicity parameter (E) of this electrophile 1 has been evaluated according to Mayr’s approach. With the E value of –9.42, Mayr’s equation was found to correctly predict the rate constants for the reactions of 1 with hydroxide ion in H2O and a 1:1 ratio of H2O to CH3CN. However, the large βnuc value of 1.12 obtained in the present work is clearly consistent with a single electron transfer (SET) mechanism.

On the Determination and Use of Reduction Potentials of Short-Lived Radicals. A Review

2000 ◽  
Vol 65 (6) ◽  
pp. 829-843 ◽  
Author(s):  
Henning Lund ◽  
Karen Skov ◽  
Steen Uttrup Pedersen ◽  
Torben Lund ◽  
Kim Daasbjerg
Keyword(s):  
Aqueous Solution ◽  
Electron Transfer ◽  
Reaction Mechanisms ◽  
Nucleophilic Attack ◽  
Grignard Reaction ◽  
Hydroxide Ion ◽  
Reduction Sequence ◽  
Reduction Potentials ◽  
Srn1 Reaction

A method, the "competition method", for the determination of reduction potentials and estimation of standard potentials for short-lived radicals is reviewed. Applications of the reduction potentials of radicals as arguments for reaction mechanisms are presented for the Grignard reaction, the photoreduction of ketones with alcohols, and the SRN1 reaction. Reductions induced by hydroxide ions are discussed in more detail, and the classic reaction between nitrosobenzene and hydroxide ion in aqueous solution is used as an example of such a reaction. A nucleophilic attack by hydroxide ion rather than an electron transfer initiates the reduction sequence. A review with 26 references.

Proton-electron transfer: kinetics and mechanism in the ketone-ketyl redox system

1988 ◽  
Vol 92 (23) ◽  
pp. 6574-6579 ◽  
Author(s):  
Yousry M. A. Naguib ◽  
Colin Steel ◽  
Saul G. Cohen
Keyword(s):  
Electron Transfer ◽  
Redox System ◽  
Kinetics And Mechanism ◽  
Electron Transfer Kinetics
Sign in / Sign up

Export Citation Format

Share Document