Showing papers on "Supporting electrolyte published in 1976"
TL;DR: In this article, the rate of the hexacyanoferrate redox system shows a first order dependence on the concentration of the cationic component of the supporting electrolyte.
201 citations
TL;DR: In this paper, the polarographic behavior of tetra-n-butylammonium hexacyanoferrate (II) has been studied in N-methylpyrrolidinone, N-N-dimethylformamide, acetonitrile, dimethylsulphoxide, N,Ndimethylthioformamide and 1,2-dichloroethane.
79 citations
TL;DR: In this paper, the effect of trifluoromethanesulfonate supporting electrolytes on the polarographic reduction of some alkaline earth and transition metal ions in N,N-dimethylformamide and acetonitrile has been investigated.
32 citations
TL;DR: In this paper, the influence of the addition of carbonate on the rate of the anodic oxidation of the formate was studied and the results were presented graphically, and the investigations in hand were undertaken to decide whether NaOH is a suitable supporting electrolyte.
19 citations
TL;DR: In this article, the effect of tetraethylammonium trifluoromethanesulfonate supporting electrolytes on the polarographic reduction of alkali metal ions in N, N-dimethylformamide and acetonitrile has been investigated.
18 citations
TL;DR: In this article, the first reduction process in dimethylformamide containing 0.1 M tetraethylam-moniumperchlorate was studied using the techniques of polarography, controlled potential coulometry and potential sweep voltammetry.
13 citations
TL;DR: A survey of nonaqueous conditions for the oxidation of n-butyl alcohol is reported in this paper, where it is shown that lithium fluoborate is superior to lithium nitrate or perchlorate as the supporting electrolyte.
12 citations
TL;DR: In this article, the cathodic reduction to alcohol of the conformationally rigid ketones 4-t-butylcyclohexanone, dihydroisophorone, trans-decalin-2-one, and trans-4a-methyldecalin 2-one has been investigated with particular reference to factors influencing the ratio of axial : equatorial alcohol.
Abstract: The cathodic reduction to alcohol of the conformationally rigid ketones 4-t-butylcyclohexanone, dihydroisophorone, trans-decalin-2-one, and trans-4a-methyldecalin-2-one has been investigated with particular reference to factors influencing the ratio of axial : equatorial alcohol. The parameters which have been varied include cathode material, solvent, proton donor, cathode potential, current density, and supporting electrolyte. The highest stereoselectivity in favour of the axial alcohols (kinetic control) is obtained using small or doubly charged electrolyte cations in ethanol. From 4-t-butylcyclohexanone the corresponding cis-alcohol is thereby obtained in 98% purity and 84% current efficiency. The control of stereochemistry is explained in terms of ion-pairing of key carbanionic intermediates.
8 citations
TL;DR: In this article, it was found that silver exerts a catalytic effect on the reduction of NO 3 − ions on the mercury electrode in neutral nitrate supporting electrolyte containing Ag + ions.
7 citations
TL;DR: In this paper, a mixture of phenylacetylene and alkyl halides in hexamethylphosphoramide containing tetra-n-butylammonium iodide as supporting electrolyte produces the corresponding alkylsphenylacetylenes in good yields.
Abstract: Electrolysis of a mixture of phenylacetylene (1) and alkyl halides in hexamethylphosphoramide containing tetra-n-butylammonium iodide as supporting electrolyte produces the corresponding alkylphenylacetylenes in good yields.
6 citations
TL;DR: In this paper, a stationary cationic polymerization of isobutyl vinyl ether in an acetonitrile-diisopropyl ether solvent is obtained at the platinum anode.
Abstract: At low current intensities with tetraethylammonium perchlorate as supporting electrolyte a stationary cationic polymerization of isobutyl vinyl ether in an acetonitrile-diisopropyl ether solvent is obtained at the platinum anode. The electrochemical and kinetic characteristics of the system are determined. An influence of water is found. The molecular weight of the polymer is mainly given by chain transfer to the monomer.
TL;DR: In this article, the effect of variations in the identities and concentrations of the anions present in the supporting electrolyte on the adsorption of Cd(II) with 2,2−bipyridine was investigated.
TL;DR: The stability constants of rare-earth complexes with 2-ethyl-2-hydroxy-3-methylbutyric acid have been determined potentiometrically at 25.0 °C and at an ionic strength of 0.10, with sodium perchlorate as the supporting electrolyte as discussed by the authors.
Abstract: The stability constants of the rare-earth complexes with 2-ethyl-2-hydroxy-3-methylbutyric acid have been determined potentiometrically at 25.0 °C and at an ionic strength of 0.10, with sodium perchlorate as the supporting electrolyte.
TL;DR: In this article, simple and sensitive methods have been developed for the determination of nickel(II), based on the catalytic polarographic current in acidic thiocyanate solution in the presence and absence of cobalt(II).
Abstract: Simple and sensitive methods have been developed for the determination of nickel(II), based on the catalytic polarographic current in acidic thiocyanate solution in the presence and absence of cobalt(II). The basis of the methods and the effect of variables have been investigated and elucidated. In the absence of cobalt(II), thiocyanate solution containing large amounts of hydrogen ions serves a supporting electrolyte, while an acidic thiocyanate solution containing tetra-n-butylammonium salts is suitable for the determination of nickel(II) in the presence of cobalt(II). These methods are applicable to the determination 2×10−6 M nickel(II) in the presence and absence of 1×103 M cobalt(II).
TL;DR: In this article, a dropping mercury indicator electrode (DME) was chosen, because the constantly renewed surface minimizes fouling problems in turbid systems, and because it has a good buffer capacity near pH 3 and is a weaker ligand than acetate for iron(II1).
TL;DR: In this paper, the performance of the Ag/Ag2CrO4 electrode for coulometric titration of lead(II) in aqueous and in 50 % ( v v ) acetone solutions is described.
TL;DR: In this article, an automatic voltammetric technique for studying the kinetics of reactions involving one or more electro-active reactants or products has been developed, which provides for automatic dilution of the reaction mixture with the supporting electrolyte in order to bring the concentrations within the voltammmetric range, automatic freezing of reaction when required, automatic stirring of reaction mixture solution and, especially, automatic recording of the current-time graph.
Abstract: The unique feature of the tubular electrode, that it permits continuous analysis of an electrolyte solution passing through it, has been made use of in developing an automatic voltammetric technique for studying the kinetics of reactions involving one or more electro-active reactants or products. The technique provides for automatic dilution of the reaction mixture with the supporting electrolyte in order to bring the concentrations within the voltammetric range, automatic freezing of the reaction when required, automatic stirring of the reaction mixture solution and, especially, automatic recording of the current-time graph, from which the kinetics of the reactions can easily be studied.The technique has been standardised by studying voltammetrically the reaction kinetics of the oxidation of potassium iodide with hydrogen peroxide in aqueous acidic solutions and comparing the data with those obtained titrimetrically. The results appear to show that the automatic technique has a high dependability. Encouraging results have been obtained in the study of the reaction kinetics of the oxidation of potassium hexacyanoferrate(II) with hydrogen peroxide and of sodium formate with potassium permanganate in acidic media.
TL;DR: In this paper, a mixture of phenylacetylene and alkyl halides in hexamethylphosphoramide containing tetra-n-butylammonium iodide as supporting electrolyte produces the corresponding alkylsphenylacetylenes in good yields.
Abstract: Electrolysis of a mixture of phenylacetylene (1) and alkyl halides in hexamethylphosphoramide containing tetra-n-butylammonium iodide as supporting electrolyte produces the corresponding alkylphenylacetylenes in good yields.
TL;DR: In this paper, simple and sensitive methods have been developed for the determination of nickel(II), based on the catalytic polarographic current in acidic thiocyanate solution in the presence and absence of cobalt(II).
Abstract: Simple and sensitive methods have been developed for the determination of nickel(II), based on the catalytic polarographic current in acidic thiocyanate solution in the presence and absence of cobalt(II). The basis of the methods and the effect of variables have been investigated and elucidated. In the absence of cobalt(II), thiocyanate solution containing large amounts of hydrogen ions serves a supporting electrolyte, while an acidic thiocyanate solution containing tetra-n-butylammonium salts is suitable for the determination of nickel(II) in the presence of cobalt(II). These methods are applicable to the determination 2×10−6 M nickel(II) in the presence and absence of 1×103 M cobalt(II).
Patent•
29 Jul 1976
TL;DR: In this article, it was shown that in the presence of tetra-(1-6C alkyl)ammonium tetrafluoroborate and/or hexafluorophosphate as supporting electrolyte using a quantity of electricity of >= 2.5.
Abstract: N-(1-alkoxyethyl)-carboxamides of formula (I): (where R5 is H, 1-6C alkyl or 6-10C aryl, pref. H or Me; R6 is 1-6C alkyl, pref. Me) are prepd. by electroysis of a mixt. of an N-ethyl-carboxamide of formula R5-CO-NH-CH2-Me (II) and an alcohol of formula R6OH (III) in presence of a tetra-(1-6C alkyl)ammonium tetrafluoroborate and/or hexafluorophosphate as supporting electrolyte using a quantity of electricity of >=2.5. Faradays per mole of (II). cpds. (I) are intermediates for N-vinyl-carboxamides, which are useful for the prodn. of water-soluble polymers.