Influence of solvents on electrochemical reduction potentials of chlorosilanes

1986 ◽  
Vol 51 (5) ◽  
pp. 967-972 ◽  
Author(s):  
Petr Duchek ◽  
Robert Ponec ◽  
Václav Chvalovský
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Reduction ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Simultaneous Effect ◽  
Reduction Potentials ◽  
Angular Strain ◽  
Influence Of Solvents

The reduction potentials of 1,1-dichloro- and 1-chloro-1-methylsilacyclobutane and their acyclic analogues were measured by cyclic voltammetry in the medium of anisole and dimethylformamide. The obtained values which reflect the simultaneous effect of angular strain and possible interactions of the depolarizer with the solvent were correlated with the result of quantum chemical calculations.

Electrochemical aromatization of dihydroazines. Effect of chalcogenophosphoryl (CGP) substituents on anodic oxidation of 9-CGP-9,10-dihydroacridines

Synthesis ◽  
2021 ◽  
Author(s):  
Alexander Schepochkin ◽  
Oleg N. Chupakhin ◽  
Nadezhda Demina ◽  
Maxim Averkov ◽  
Tatyana Shimanovskaya ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Structural Analysis ◽  
Quantum Chemical Calculations ◽  
Anodic Oxidation ◽  
Quantum Chemical ◽  
X Ray

The effect of chalcogenophosphoryl fragments on the anodic oxidation of 9-chalcogenophosphoryl-9,10-dihydroacridines was studied in detail. The data of X-ray structural analysis, quantum chemical calculations and cyclic voltammetry obtained for these compounds provide an explanation of the observed features. The direct electrochemical phosphorylation of acridine was first carried out successfully.

scholarly journals Troilite (FeS) Oxidation in the Presence of a Newly Synthesized TRIS-based Base

2019 ◽  
Vol 70 (7) ◽  
pp. 2639-2642
Author(s):  
Madalina Ionela Duinea ◽  
Geta Carac ◽  
Irina Daniela Dabuleanu ◽  
Mihaela Alexandra Petcu ◽  
Laura Gabriela Sarbu ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Schiff Base ◽  
Optical Microscopy ◽  
Quantum Chemical Calculations ◽  
Potentiodynamic Polarization ◽  
Quantum Chemical ◽  
Corrosion Current ◽  
Inhibitory Effect ◽  
Oxidative Dissolution ◽  
Current Densities

The effect of a newly synthesized TRIS-based Schiff base (XC) on the oxidative dissolution of FeS in air-equilibrated solutions with pH 2.26 and temperature of 27�C was investigated by Potentiodynamic polarization, Cyclic Voltammetry, Optical Microscopy and quantum chemical calculations. The XC concentration varied between 0 and 0.52 mM. It was observed that XC decreases the corrosion current densities of the oxidative dissolution of FeS. Our results indicate that the inhibitory effect of XC is due to its adsorption on the FeS surface.

Electroreduction of Organic Compounds, 23 [1].Preparation of the Highly Strained 1′,3′-Dichlorodispiro[cyclopropane-1,2′-bicyclo[ 1.1.0lbutane-4′,1″-cyclopropane][2]

1993 ◽  
Vol 48 (9) ◽  
pp. 1288-1290 ◽  
Author(s):  
Thomas Strelow ◽  
Jürgen Voss ◽  
Werner Baum
Keyword(s):  
Electrochemical Reduction ◽  
Quantum Chemical Calculations ◽  
Organic Compounds ◽  
Title Compound ◽  
Quantum Chemical ◽  
Highly Strained

The preparation of the title compound 4 by electrochemical reduction of 4,4,8,8-tetrachloro-dispiro[2.1.2.1]octane 3 is described. The geometry of the compounds is discussed in terms of quantum chemical calculations and spectroscopic results.

Strukturen ladungsgestörter oder räumlich überfüllter Moleküle, 80 [1 - 3] Strukturänderungen von p-Benzochinon durch Donator- und Akzeptor-Substituenten

1996 ◽  
Vol 51 (2) ◽  
pp. 153-171 ◽  
Author(s):  
Hans Bock ◽  
Sabine Nick ◽  
Wolfgang Seitz ◽  
Christian Näther ◽  
Jan W. Bats
Keyword(s):  
Charge Distribution ◽  
Quantum Chemical Calculations ◽  
Satisfactory Agreement ◽  
Quantum Chemical ◽  
Structural Changes ◽  
Structural Data ◽  
Semiempirical Calculations ◽  
Reduction Potentials ◽  
Donor Acceptor ◽  
Structural Summary

Abstract The structures of seven di- or tetrasubstituted p-benzoquinone derivatives O=C(XC=CH )2C=O and O=C(XC=CX)2C=O with substituents X = -OCH3, -N(CH2)5, - N(CH2CH2)2O, -Cl, -CN and -⊕N(HC=CH)2C-N(CH3)2 are presented and discussed in comparison with published ones substituted by X = -Si(CH3)3, -C6H5, -N(CH3)2, -⊕N(HC=CH)2CN(CH3)2, -O⊖ , and - NO2. Based on the introduction, in which halfwave-reduction potentials, geometry-optimized quantum-chemical calculations on substituent perturbation and known structural data of p-benzoquinone derivatives are used to characterize their molecular ground states. The structural changes indicate how substituent perturbations might be rationalized. Of the categories defined - imperturbed, donor, donor/acceptor and acceptor perturbed - the donorsubstituted p-benzoquinones do exhibit the largest differences, often called cyanine distorsion. In very satisfactory agreement with extensive semiempirical calculations, all effects determined experimentally are discussed in terms of varying charge distribution. With respect to the biochemical importance of p-benzoquinone derivatives, this first structural summary points out important facets.

Dissociative electron transfer in polychlorinated aromatics. Reduction potentials from convolution analysis and quantum chemical calculations

2016 ◽  
Vol 18 (32) ◽  
pp. 22573-22582 ◽  
Author(s):  
Piotr P. Romańczyk ◽  
Grzegorz Rotko ◽  
Stefan S. Kurek
Keyword(s):  
Electron Transfer ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Redox Potentials ◽  
Dissociative Electron Transfer ◽  
Reduction Potentials ◽  
Polychlorinated Benzenes

The combination of convolution analysis and quantum-chemical calculations at DFT and CCSD(T)-F12 levels allows the determination of standard redox potentials and the mechanism type of dissociative ET in environmentally relevant polychlorinated benzenes.

Cathodic processes of neodymium(iii) in LiF–NdF3–Nd2O3 melts

2016 ◽  
Vol 190 ◽  
pp. 339-349 ◽  
Author(s):  
Chao Huang ◽  
Xiaolong Liu ◽  
Yuan Gao ◽  
Shizhe Liu ◽  
Bing Li
Keyword(s):  
Mass Transfer ◽  
Cyclic Voltammetry ◽  
Electrochemical Reduction ◽  
Square Wave Voltammetry ◽  
Square Wave ◽  
Potentiostatic Electrolysis ◽  
Reduction Potentials ◽  
Wave Voltammetry ◽  
Cathodic Processes ◽  
Kinetics Of

In this paper, cyclic voltammetry and square wave voltammetry are applied to characterize the cathode processes of neodymium ions on a W electrode in LiF–NdF3 melts with or without the metal Nd. The results indicate that neodymium ions in the LiF–NdF3 (2 wt%) melt are reduced in two steps, i.e. Nd3+ → Nd2+ and Nd2+ → Nd0, corresponding to starting reduction potentials of 0.35 V vs. Li+/Li and 0.1 V vs. Li+/Li, respectively. The Nd3+ → Nd2+ process is controlled by mass transfer and the Nd2+ → Nd0 process is controlled by both an interfacial step and mass transfer. But in the LiF–NdF3 melt with excess metal Nd equilibrium, the kinetics of the above two processes are controlled by mass transfer. After potentiostatic electrolysis at 0.35 V in the LiF–NdF3–Nd2O3 melt NdF2 is formed on the Mo cathode, and metallic Nd is obtained by potentiostatic electrolysis at 0.1 V in the LiF–NdF3–Nd2O3–Nd melt, which validates the above electrochemical reduction results.

Influence of substituents on electrochemical reduction potentials of benzenediazonium salts

1989 ◽  
Vol 54 (12) ◽  
pp. 3135-3143 ◽  
Author(s):  
Pavel Janderka ◽  
Igor Cejpek
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Reduction ◽  
Linear Correlation ◽  
Structural Parameters ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Reduction Potentials ◽  
Pulse Polarography ◽  
Substituent Constants ◽  
Influence Of Substituents

TAST polarography, differential pulse polarography, and cyclic voltammetry on a hanging mercury drop and on a platinum disc were employed to measure the electrochemical reduction potentials of nine para substituted benzenediazonium salts in dimethylformamide. A satisfactory linear correlation was obtained between the potentials of the adsorption prewave and the substituent constants σ+p. The influence of substituents on some structural parameters was studied by using the CNDO/2 method for both a closed and a opened shell.

Nicotine – Metal ion interactions in solutions: Potentiometric, cyclic voltammetry investigations and quantum chemical calculations

2017 ◽  
Vol 112 ◽  
pp. 283-292 ◽  
Author(s):  
Ahmed E. Fazary ◽  
Yi-Hsu Ju ◽  
Khaled F. Fawy ◽  
Ayed S. Al-Shihri ◽  
Mutasem Z. Bani-Fwaz ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Metal Ion ◽  
Ion Interactions ◽  
Metal Ion Interactions
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