Relevant bibliographies by topics / Basic media and aprotic solvent

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Academic literature on the topic 'Basic media and aprotic solvent'

Author: Grafiati
Published: 4 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Basic media and aprotic solvent"

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Janderka, Pavel, Oldřich Fischer, and Eva Fischerová. "Effect of the Solvent Basicity and Additives on the Electroreduction of Picric Acid and Tetramethylammonium Picrate in Aprotic Media." Collection of Czechoslovak Chemical Communications 62, no. 4 (1997): 581–96. http://dx.doi.org/10.1135/cccc19970581.

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The electroreduction of picric acid and tetramethylammonium picrate in acetonitrile, acetone, N,N-dimethylformamide, dimethyl sulfoxide and hexamethylphosphoramide has been studied by normal pulse polarography, cyclic voltammetry and by coulometric analysis. The reduction of undissociated acid starts in all aprotic media with consumption of one electron. The reduction potential is shifted to more negative potentials with rising basicity of the solvent, i.e. with rising dissociation constant of picric acid. The formation of anion radicals is followed by the sequence of acido-basic selfprotonati
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Nevěčná, Taťjana, Vojtěch Bekárek, and Oldřich Pytela. "A Study of Effects of Temperature and Medium on Reaction of Triethylamine with Ethyl Bromide." Collection of Czechoslovak Chemical Communications 59, no. 6 (1994): 1384–91. http://dx.doi.org/10.1135/cccc19941384.

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The rate constants of reaction of triethylamine with ethyl bromide have been measured in 13 solvents at the temperatures of 293, 313, 333, and 373 K. The activation entropies in the individual solvents increase when going from nonpolar to dipolar aprotic and polar protic solvents, which is explained by dominant solvation of the basic triethylamine and by formation of highly ordered associates without solvent in the activated complex in nonpolar solvent media. No isokinetic relationship has been found between the activation entropy and activation enthalpy, which indicates different solvent effe
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Kankaanperä, Alpo, Pirketta Scharlin, Ilona Kuusisto, Riitta Kallio, and Emma Bernoulli. "Ureas and amides as dipolar aprotic solvents in highly basic media. The dependence of kinetic basicity on solvent composition." Journal of the Chemical Society, Perkin Transactions 2, no. 2 (1999): 169–74. http://dx.doi.org/10.1039/a808435a.

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Morteza, Shiri, Farajpour Behnaz, Bozorgpour-Savadjani Zahra, et al. "Transition-metal free highly selective aerobic oxidation of hindered 2-alkylindoles." Tetrahedron 71, no. 34 (2015): 5531–37. https://doi.org/10.1016/j.tet.2015.06.065.

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A novel and easy access to highly complex 3-oxoindolin-2-ylidene derivatives from the exposure of Ugiadducts bearing an indolyl moiety in Cs2CO3/DMF to air is reported. This is the first example of aerobic oxidation of 2-alkylindoles to 3-oxoindolin-2-ylidenes. Some advantages of this method are the use of air as oxygen source, transition metal-free reagents and simple conditions, a multicomponent and one-pot process and highly regioand stereoselective manner to trans-3-oxoindolin-2-ylidenes.
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Petukhov, Dmitrii I., Dmitrii A. Buldakov, Alexey A. Tishkin, Alexey V. Lukashin, and Andrei A. Eliseev. "Liquid permeation and chemical stability of anodic alumina membranes." Beilstein Journal of Nanotechnology 8 (March 6, 2017): 561–70. http://dx.doi.org/10.3762/bjnano.8.60.

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A study on the chemical stability of anodic alumina membranes and their performance in long-term water and organic solvent permeation experiments is reported. Anodic alumina possesses high stability for both protonic and aprotonic organic solvents. However, serious degradation of the membrane occurs in pure water, leading to a drastic decrease of permeance (over 20% of the initial value after the passing of 0.250 m3/m2 of pure water). The drying of the membrane induces further permeance drop-off. The rate of membrane degradation strongly depends on the pH of the penetrant solution and increase
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Mchedlov-Petrossyan, Nikolay O. "Nikolai Izmailov (1907-1961): An appreciation." Pure and Applied Chemistry 80, no. 7 (2008): v. http://dx.doi.org/10.1351/pac20088007v.

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The International Conference on Modern Physical Chemistry for Advanced Materials was organized primarily to commemorate the centenary of the birth of Prof. Nikolai Izmailov and to pay tribute to his scientific achievements and legacy. Nikolai Arkadievich Izmailov was born in Sukhumi, in the southern region of the Russian Empire, on 22 June 1907. After his family moved to Kharkov (in Ukrainian: Kharkiv), he developed an early interest in chemistry and eventually enrolled as a Ph.D. student at Kharkov State University (at that time, it was called the Kharkov Institute of Public Education) in 192
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Bowden, Keith, and Shyla Prasannan. "Reactions in strongly basic media. Part 8. Correlation of the rates of alkaline hydrolysis of 2,4-dinitroanisole and 2-methoxy-5-nitropyridine in aqueous dipolar aprotic solvents with acidity functions. An order of basicity for aqueous dipolar aprotic solvents." Journal of the Chemical Society, Perkin Transactions 2, no. 2 (1987): 185. http://dx.doi.org/10.1039/p29870000185.

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Panteleev, S. V., S. V. Maslennikov, A. N. Egorochkin, and V. Yu Vakulenko. "Solvent effect on metal oxidation rates in aprotic media." Russian Journal of General Chemistry 77, no. 6 (2007): 1004–7. http://dx.doi.org/10.1134/s1070363207060084.

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Kushch, S. D. "Nitrobenzene Hydrogenation to N-phenylhydroxylamine: a New Approach to the Selectivity." Eurasian Chemico-Technological Journal 4, no. 1 (2017): 19. http://dx.doi.org/10.18321/ectj513.

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A new approach to resolve the problem of selectivity with respect to N-phenylhydroxylamine in nitrobenzene hydrogenation is proposed. N-phenylhydroxylamine only is the final product of nitrobenzene electroreduction in aprotic media. In this case nitrobenzene reduction carries out by alternation of electrochemical (electron transfer) and chemical (species formed protonation) stages i.e. by so-called EC mechanism. Such mechanism realization in nitrobenzene hydrogenation is possible if i) a catalyst activates hydrogen as “hydrogen electrode” i.e. serves electrons source; ii) a reaction media cont
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Amanchukwu, Chibueze. "(Invited) Manipulating Water Using Aprotic Solvents for CO2 Electrochemical Reduction." ECS Meeting Abstracts MA2024-02, no. 62 (2024): 4164. https://doi.org/10.1149/ma2024-02624164mtgabs.

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Carbon dioxide (CO2) electrochemical conversion is vital because it provides a pathway to efficiently valorize CO2 and incentivize CO2 capture. Electrocatalytic CO2 reduction reaction (CO2RR) is of great interest because it is scalable and can be done at ambient temperature and pressure. However, these reactions are typically performed in water which suffers from undesired hydrogen evolution reaction (HER) from water breakdown. Aprotic nonaqueous electrolytes can suppress HER and enable a wider range of catalysts for CO2RR. However, water is still needed as a proton source and to stabilize cha
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Book chapters on the topic "Basic media and aprotic solvent"

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Leitner, Walter. "Fluorous Phases and Compressed Carbon Dioxide as Alternative Solvents for Chemical Synthesis: A Comparison." In Green Chemistry Using Liquid and Supercritical Carbon Dioxide. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195154832.003.0009.

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The principal goal of basic research in chemical synthesis is the development of efficient tools for functional group transformations and for the assembly of building blocks during the construction of molecules with increasing complexity. Traditionally, new approaches in this area have focused on the quest for new reaction pathways, reagents, or catalysts. Comparably less effort has been devoted to utilize the reaction medium as a strategic parameter, although the use of solvents is often crucial in synthetically useful transformations. The first choice for a solvent during the development of
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Nelson, William M. "Solvation and Solvent Phenomena." In Green Solvents for Chemistry. Oxford University PressNew York, NY, 2003. http://dx.doi.org/10.1093/oso/9780195157369.003.0003.

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Abstract The role of solvents in chemical reactions has been well documented. It may be characterized as a carrier for another substance, as a medium for conducting a chemcal reaction, or as a means of extracting or separating other substances. Whatever the precise definition used, solvents are a ubiquitous feature of modern chemical research, industry and everyday life. A change of solvents or the use of different solvating media entirely can alter the rate of the chemical process, can shift the product mixture, and can significantly change the economics of the chemical process. The critical
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Conference papers on the topic "Basic media and aprotic solvent"

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Agarwala, Vinod S., and Krishnan Rajeshwar. "Paint and Coating Removal Technologies: Past, Present and Future." In CORROSION 2001. NACE International, 2001. https://doi.org/10.5006/c2001-01577.

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Abstract All painted structures, whether metallic or non-metallic, are stripped and repainted for a variety of reasons at one time or another. The most important reason of them all is for loss of corrosion protection. Paint stripping methods have varied from classical approach of hand or mechanical scrubbing with abrasive materials to use of chemicals. In the last decade, the concerns for environmental pollution and human health have changed all that. The search for cleaner and greener technologies for paint stripping process has begun. For the present discussion, these technologies have been
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M. ALI, Hanan, Asawer Salim TEMMA, and Omar Naji ALI. "ANALYTICAL STUDIES AND THE EFFECT OF TRYPAN BLUE IN HUMAN ESOPHAGUS CANCER CELLS." In VIII.International ScientificCongressofPure,AppliedandTechnological Sciences. Rimar Academy, 2023. http://dx.doi.org/10.47832/minarcongress8-20.

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Analytical studies of Trypan Blue (TB) diazo dye; showed, highest solubility in water without deviation in the linearity between a dipole moment constants and maximum wavelength. Because of the absorption spectrum of TB affected by using a range of different solvents via solvation and dielectric constant (D). The linear relationship between ʎmax and each function F(D), and (D-1)/(D+1), Shown that the D is the only operator that controls shift in the peak. Results also showed, that the deviation from the linear relationship of DMSO is explained on the basis of the formation of strong hydrogen b
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Reports on the topic "Basic media and aprotic solvent"

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Wongkasemjit, Sujitra. Novel synthesis study of high surface area silica : final report. Chulalongkorn University, 2002. https://doi.org/10.58837/chula.res.2002.71.

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The sol-gel transition of tetra-coordinated spirosilicate via hydrolysis and condensation under acidic and basic conditions is examined to elucidate the effect of catalyst, reaction time and temperature on the properties of obtained gel. The main advantage of this process is the low temperature employed, producing a solid network with a high specific surface area. FTIR spectroscopy and TGA analysis were used to characterize the formation of siloxane bonds (Si-O-Si). It is found that spirosilicate can be hydrolyzed under both acid and base catalyzed conditions. The condensation rate to silicate
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