Amino-nitrile cleavage in the electrochemical reduction of hydeazones of aromatic aldehydes

1988 ◽  
Vol 37 (3) ◽  
pp. 510-514 ◽  
Author(s):  
Yu. M. Kargin ◽  
M. Yu. Kitaeva ◽  
V. Z. Latypova ◽  
A. A. Vafina ◽  
R. M. Zaripova ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Aromatic Aldehydes ◽  
Amino Nitrile

Article

1999 ◽  
Vol 77 (10) ◽  
pp. 1648-1654
Author(s):  
F Williot ◽  
M Bernard ◽  
D Lucas ◽  
Y Mugnier ◽  
J Lessard
Keyword(s):  
Mass Spectrometry ◽  
Key Words ◽  
Electrochemical Reduction ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Base Catalysis ◽  
Chain Reaction ◽  
Chain Reactions

The electrochemical reduction of nitrosobenzene (PhNO) in the presence of cyclopentadiene derivatives containing the indenyl group represented as In'H2 (10a, 10b, and 12b) gives the imine derivatives PhN=In'. The process requires only a catalytic amount of electricity. When the electrolysis of aromatic aldehydes (ArCHO), 2,6-dichlorobenzaldehyde (1a), benzaldehyde (1b) and terephthalaldehyde (2), is performed in the presence of the In'H2 derivatives, compounds ArCH=In' are obtained in low yields. These compounds have been characterized by mass spectrometry and microanalysis. The overall process involves two consecutive chain reactions with regeneration of the anion In'H-.Key words: electrochemical reduction, nitrosobenzene, aromatic aldehydes, base catalysis, chain reaction.

Mechanism for the amino-nitrile dissociation in the electrochemical reduction of hydrozone derivatives of nitrobenzaldehyde

1984 ◽  
Vol 33 (10) ◽  
pp. 2206-2206
Author(s):  
Yu. M. Kargin ◽  
V. Z. Latypova ◽  
M. Yu. Kitaeva ◽  
A. A. Vafina ◽  
R. M. Zaripova ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Amino Nitrile ◽  
Derivatives Of

Addition of cyclopentadiene derivatives on aromatic aldehydes or nitrosobenzene initiated by electrochemical reduction

1999 ◽  
Vol 77 (10) ◽  
pp. 1648-1654
Author(s):  
F. Williot ◽  
M. Bernard ◽  
D. Lucas ◽  
Y. Mugnier ◽  
J. Lessard
Keyword(s):  
Electrochemical Reduction ◽  
Aromatic Aldehydes

Electrochemically induced chain reactions: the addition of fluorene and indene to aromatic aldehydes initiated by electrochemical reduction

1996 ◽  
Vol 74 (1) ◽  
pp. 55-63 ◽  
Author(s):  
J. C. Gard ◽  
B. Hanquet ◽  
L. Roullier ◽  
Y. Mugnier ◽  
J. Lessard
Keyword(s):  
Electrochemical Reduction ◽  
Supporting Electrolyte ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Proton Donor ◽  
Base Catalysis ◽  
Tetrabutylammonium Perchlorate ◽  
Chain Reaction ◽  
Chain Reactions ◽  
Voltammetric Behavior

The electrochemical reduction at −30 °C of 2,6-dichlorobenzaldehyde (1a), benzaldehyde (1b), and terephthalaldehyde (2) in tetrahydrofuran with tetrabutylammonium perchlorate as supporting electrolyte, under an argon atmosphere and in the presence of fluorene or indene, gives carbinols resulting from the addition of fluorene or indene and requires only a catalytic amount of electricity. The chain reaction is initiated by proton abstraction from fluorene or indene by a base electrogenerated by reduction of the aldehyde and the propagation involves the addition of the carbanion to the aldehyde followed by regeneration of the nucleophile by proton transfer from the proton donor to the alkoxide anion (base-catalyzed addition). The voltammetric behavior of the aldehydes in the absence and in the presence of fluorene or indene is also presented. Key words: electrochemical reduction, aromatic aldehydes, addition of fluorene (indene), base catalysis, chain reaction.

In Situ X-Ray Absorption Studies of the Electrochemical Reduction of Hydroxocobalamin

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-619-C2-620 ◽  
Author(s):  
M. Giorgett ◽  
I. Ascone ◽  
M. Berrettoni ◽  
S. Zamponi ◽  
R. Marassi
Keyword(s):  
Electrochemical Reduction ◽  
X Ray ◽  
Absorption Studies ◽  
X Ray Absorption

Lateral Adsorbate Interactions Inhibit HCOO- While Promoting CO Selectivity for CO2 Electrocatalysis on Ag

2018 ◽  
Author(s):  
Divya Bohra ◽  
Isis Ledezma-Yanez ◽  
Guanna Li ◽  
Wiebren De Jong ◽  
Evgeny A. Pidko ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Experimental Approach ◽  
Decisive Role ◽  
Experimental Methods ◽  
Reaction Intermediates ◽  
Intermediate Species ◽  
Experimental Knowledge ◽  
Complex Interactions ◽  
Ag Catalysts

<p>The analysis presented in this manuscript helps bridge an important fundamental discrepancy between the existing theoretical and experimental knowledge regarding the performance of Ag catalysts for CO<sub>2</sub> electrochemical reduction (CO<sub>2</sub>ER). The results demonstrate how the intermediate species *OCHO is formed readily en-route the HCOO<sup>– </sup>pathway and plays a decisive role in determining selectivity of a predominantly CO producing catalyst such as Ag. Our theoretical and experimental approach develops a better understanding of the nature of competition as well as the complex interactions between the reaction intermediates leading to CO, HCOO<sup>–</sup> and H<sub>2</sub> during CO<sub>2</sub>ER.</p><p><br></p><p>Details of computational and experimental methods are present in the Supporting Information provided. </p><p><br></p><p><br></p>

Photochemical and Electrochemical Reduction of Carbon Dioxide Catalyzed by a Polyoxometalate-Organic Photosensitizer Complex

2018 ◽  
Author(s):  
Chandan Dey ◽  
Ronny Neumann
Keyword(s):  
Carbon Dioxide ◽  
Cyclic Voltammetry ◽  
Formic Acid ◽  
Electrochemical Reduction ◽  
Mass Spectroscopy ◽  
Photochemical Reactions ◽  
Reducing Agent ◽  
Covalent Attachment ◽  
Hybrid Complex ◽  
Open Face

<p>A manganese substituted Anderson type polyoxometalate, [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup>, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO<sub>2</sub> reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO<sub>2</sub> to CO with a TOF of ~15 sec<sup>-1</sup>. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO<sub>2</sub> to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo<sub>6</sub>O<sub>24</sub>]<sup>9-</sup> is necessary for photocatalysis.</p><div><br></div>

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