Results 251 to 260 of about 995,504 (317)

Cellulose solutions in dipolar aprotic solvents

Polymer Science Series A, 2010
Preparation conditions and properties of cellulose solutions in DMAA containing 7–8% lithium chloride are considered. Investigation of the optical anisotropy and structure of cellulose solutions in this solvent confirms that the LS state is attained with an increase in the concentration of cellulose.
A. K. Dibrova, O. A. Khanchich
openaire   +1 more source

Solvation and sodium conductivity of nonaqueous polymer electrolytes based on Nafion-117 membranes and polar aprotic solvents

Solid State Ionics, 2018
Nafion-117 membranes in the Na+-forms with pore-intercalated mixtures of aprotic organic solvents have been obtained. Dependences of solvent uptake of the membranes versus their pretreatment conditions and compositions of initial organic solvent mixtures
D. Voropaeva, S. Novikova, T. Kulova, A. Yaroslavtsev   +3 more
semanticscholar   +1 more source

Ozonolysis of verbenone in aprotic solvents

Mendeleev Communications, 2009
The ozonolysis of verbenone in methylene chloride and acetonitrile at –60 and 0 °C proceeds with cleavage of the double bond and neighbouring σ-bond to give (1 R ,3 S )-acetyl-2,2-dimethylcyclobutane carboxylic acid. The mechanism of the reaction has been proposed.
Olga S. Kukovinets, Tatyana I. Zvereva, Natalya N. Kabalnova, Vakhtang G. Kasradze, Elena V. Salimova, Lyucia R. Khalitova, Marat I. Abdullin, Leonid V. Spirikhin   +7 more
openaire   +1 more source

Electrolyte solvation in aprotic solvents

Journal of Power Sources, 1989
Abstract The nature of specific ionsolvent, ionion and solventsolvent interactions is reviewed in the context of their relation to the development of lithium batteries. For aprotic solvents of permittivities > ≈ 15, the “medium effect” has been found to offer insights into basic problems ( e.g.
openaire   +1 more source

Electrode Kinetics in Nonaqueous Aprotic Solvents

Journal of The Electrochemical Society, 1985
Etudes, a l'aide de la methode d'impedance faradique, de la cinetique de reduction de Na + en presence d'une electrode a goutte de mercure, dans 4 solvants aprotiques (carbonate de propylene, DMF, DMSO et acetonitrile)
Jacob Jorné, Purnachandra G. Pai
openaire   +1 more source

Electrochemical reduction of benzenesulphenyl chloride in aprotic solvents

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1978
The cathodic behaviour of benzenesulphenyl chloride has been studied at a platinum electrode in acetonitrile by using cyclic voltammetry and controlled potential electrolysis. It has been evidentiated that PhSCl gives rise, in an one-electron reduction process, to PhSSPh and Cl− according to 2PhSCl+2e−→PhSSPh+2Cl− The chloride ions so generated ...
G. Bontempelli, F. Magno, SEEBER, Renato, G. A. Mazzocchin   +3 more
openaire   +2 more sources

Base Catalysis of Aromatic Nucleophilic Substitution Reactions in Aprotic and Dipolar Aprotic Solvents

Bulletin des Sociétés Chimiques Belges, 1982
For base-catalysed aromatic nucleophilic substitution reactions in benzene, catalysis by added base is observed irrespective of whether the catalyst is a stronger or a weaker base than the nucleophile. In acetonitrile, catalysis is only observed if the catalyst has either approximately the same strength or is a stronger base than the nucleophile. These
Titus O. Bamkole, Jack Hirst, Ikenna Onyido   +2 more
openaire   +1 more source

Nucleophilic Substitution in Dipolar Aprotic Solvents: Hexamethylphosphoric triamide

Helvetica Chimica Acta, 1972
AbstractThe rate of the reaction between ethyl tosylate and chloride as well as bromide ion has been measured in hexamethylphosphoric triamide in the presence of several counterions. Rate constants for the free ions at 25.0° are 14.4 mole−1 for chloride and 2.0 mole−1min−1 for bromide, both independent of the cation used.
Muller, Paul, Siegfried, Bernard
openaire   +2 more sources

Complexes of acid amides with aprotic polar solvents IV. Complexes of poly(acid amides) with aprotic solvents

Journal of Thermal Analysis, 1983
The process of solid-phase cyclodehydration of films cast from solutions of poly(acid amides) (PAA) in dimethylformamide, dimethylacetamide and N-methyl-2-pyrrolidone has been investigated by mass-spectrometric thermal analysis (MTA). It is shown that MTA is a structure-sensitive method making it possible to follow the appearance and changes in the ...
Yu. N. Sazanov, L. A. Shibaev, T. I. Zhukova, N. G. Stepanov, S. A. Dauengauer, T. M. Bulina   +5 more
openaire   +1 more source

Efficient Absorption of SO2 by Deep Eutectic Solvents Formed by Biobased Aprotic Organic Compound Succinonitrile and 1-Ethyl-3-methylimidazolium Chloride

ACS Sustainable Chemistry and Engineering, 2019
We report that deep eutectic solvents can be formed by biobased aprotic organic compound succinonitrile (SN) functionalized as the hydrogen bond donor with solid ionic liquid 1-ethyl-3-methylimidazolium chloride ([Emim][Cl]) or 1-ethyl-3 ...
Dezhong Yang, Shaoze Zhang, D. Jiang
semanticscholar   +1 more source