Réactivité de la combinaison anthracène–lithium vis-à-vis des nitriles

1975 ◽  
Vol 53 (21) ◽  
pp. 3158-3166 ◽  
Author(s):  
Jean-Paul Mazaleyrat
Keyword(s):  
Electron Transfer ◽  
Carbon Atom ◽  
Transfer Process ◽  
Nucleophilic Addition ◽  
Nucleophilic Attack ◽  
Electron Transfer Process ◽  
Ethereal Solution ◽  
Competitive Reactions ◽  
Reaction Proceeds

Lithium anthracenylide in ethereal solution behaves as a basic reagent towards nitriles with acidic hydrogens. However, in the case of nitriles with a tertiary α-carbon atom, two competitive reactions may occur: nucleophilic attack and electron transfer. The nucleophilic addition is faster, but because of its reversibility, the reaction proceeds, through the electron transfer process which is followed by the irreversible breaking of the C—CN bond, towards the formation of 9-alkyl-9,10-dihydroanthracene.

Competition between nucleophilic addition and electron-transfer process in the reaction of 9-diazo-10-anthrone with grignard reagents

Tetrahedron ◽  
1996 ◽  
Vol 52 (19) ◽  
pp. 6795-6802 ◽  
Author(s):  
Paolo Bruni ◽  
Patricia Carloni ◽  
Carla Conti ◽  
Elisabetta Giorgini ◽  
Lucedio Greci ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transfer Process ◽  
Nucleophilic Addition ◽  
Grignard Reagents ◽  
Electron Transfer Process

Thionine–graphene oxide covalent hybrid and its interaction with light

2017 ◽  
Vol 19 (22) ◽  
pp. 14412-14423 ◽  
Author(s):  
Ewelina Krzyszkowska ◽  
Justyna Walkowiak-Kulikowska ◽  
Sven Stienen ◽  
Aleksandra Wojcik
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Excited State ◽  
Transfer Process ◽  
Singlet Excited State ◽  
Functionalized Graphene ◽  
Electron Transfer Process ◽  
Functionalized Graphene Oxide ◽  
Back Electron Transfer

Quenching of the thionine singlet excited state in covalently functionalized graphene oxide with an efficient back electron transfer process.

scholarly journals Electrokinetic and Impedimetric Dynamics of FeCo-Nanoparticles on Glassy Carbon Electrode

Nano Hybrids ◽  
2013 ◽  
Vol 3 ◽  
pp. 1-23 ◽  
Author(s):  
Chinwe O. Ikpo ◽  
Njagi Njomo ◽  
Kenneth I. Ozoemena ◽  
Tesfaye Waryo ◽  
Rasaq A. Olowu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Transfer Process ◽  
Dimethyl Carbonate ◽  
Electrochemical Impedance ◽  
Ethylene Carbonate ◽  
Carbon Electrode ◽  
Electron Transfer Process ◽  
Feco Nanoparticles

The electrochemical dynamics of a film of FeCo nanoparticles were studied on a glassy carbon electrode (GCE). The film was found to be electroactive in 1 M LiClO4 containing 1:1 v/v ethylene carbonate dimethyl carbonate electrolyte system. Cyclic voltammetric experiments revealed a diffusion-controlled electron transfer process on the GCE/FeCo electrode surface. Further interrogation on the electrochemical properties of the FeCo nanoelectrode in an oxygen saturated 1 M LiClO4 containing 1:1 v/v ethylene-carbonate-dimethyl carbonate revealed that the nanoelectrode showed good response towards the electro-catalytic reduction of molecular oxygen with a Tafel slope of about 120 mV which is close to the theoretical 118 mV for a single electron transfer process in the rate limiting step; and a transfer coefficient (α) of 0.49. The heterogeneous rate constant of electron transfer (ket), exchange current density (io) and time constant (τ) were calculated from data obtained from electrochemical impedance spectroscopy and found to have values of 2.3 x 10-5 cm s-1, 1.6 x 10-4 A cm-2 and 2.4 x 10-4 s rad-1, respectively.

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