SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 4600 papers in Chemistry
This paper reports the synthesis of monohydric saturated and acetylenic tertiary alcohols of the ferrocene series from monoacetylferrocene and monobenzoylferrocene. Saturated alcohols were prepared by condensation with Grignard reagents, while acetylenic alcohols were obtained using acetylenylmagnes…
This paper investigates the molecular diffusion of hydrogen in molten calcium aluminosilicate slags, addressing earlier mass transfer values that were likely dominated by convection in furnace-scale experiments. The authors used thin viscous slag layers at 1410 to 1600°C and measured nonstationary r…
This study examines how coadsorbed reacting molecules affect dehydration kinetics in the adsorbed layer on alumina catalysts prepared by different methods. Binary mixtures of lower alcohols, ethers, and water were tested by comparing the decomposition rate of a fixed small amount of one component wi…
Electron paramagnetic resonance was used to examine the structure and magnetic states of selected copper acetate and chloroacetate complexes, especially addition products with quinoline, pyridine, and ammonia. Measurements on polycrystalline samples at 9330 MHz showed triplet spectra for green monoq…
This paper reports the synthesis of 6-azacytidine and several derivatives as analogs of nucleic acid pyrimidines with potential antimetabolic and antitumor activity. Starting from industrially available 6-azauridine, the authors prepared peracyl derivatives, converted them with phosphorus pentasulfi…
The paper proposes a universal interaction curve for valence-unbound carbon and hydrogen atoms in organic molecules, reformulating the 6-exp potential in reduced coordinates using equilibrium distances and a small set of adjustable parameters. With a common parameter choice, the resulting potential …
This paper examines the electrode behavior of glass electrodes containing two acidic, glass-forming oxides, focusing on how small additions of a second oxide alter the transition between hydrogen and alkali-metal functions. Using potential measurements as a function of pH in buffer solutions with fi…
This paper examines why rate constants for ionic and ion, molecular reactions often deviate from the linear dependence on reciprocal dielectric constant predicted by simple continuum electrostatic theories. It argues that treating the solvent as a molecular medium, rather than as a homogeneous diele…
This paper describes a synthetic route to high molecular weight alpha, omega dicarboxylic acids, specifically 1,14 tetradecanedicarboxylic acid and 1,15 pentadecanedicarboxylic acid. The method uses free radical addition of cyclopentanone or cyclohexanone to undecylenic acid in the presence of tert …
This paper examines whether ordered arrangements of monomer molecules can promote polycondensation, extending earlier observations on ordered systems in polymerization. The authors report the synthesis of high molecular weight, heat resistant polyvinylenes from carbonyl compounds such as acetone, ac…
The study examines the reaction of ortho, meta, and para nitrobenzenediazonium borofluorides with phosphorus trichloride under Doak and Freedman type conditions, focusing on unexpected products formed during attempted synthesis of ortho nitrobenzenephosphonic acid. By varying the ratios of phosphoru…
This study examines how phosphate and polyphosphate additives affect the solubilizing ability and micellar properties of soap detergent solutions. Using a direct volumetric method, the authors measured limiting solubilization of toluene and heptane in sodium laurinate and sodium naphthenate solution…
This paper describes the synthesis of secondary gamma silicon containing acetylenic alcohols by reacting chlorosilanes with dimagnesium bromide derivatives of secondary acetylenic alcohols. The authors prepare trimethylsilyl and triethylsilyl pentynol derivatives and characterize them by boiling poi…
This study examines whether azoferrocene undergoes transformations analogous to the benzidine rearrangement of azobenzene and related intramolecular rearrangements in benzene chemistry. Azoferrocene was synthesized from ferrocenyl lithium and nitrous oxide, then treated with strong acids and reducin…
This paper investigates the synthesis of polyacetylene by oxidation of copper acetylide formed from acetylene and divalent copper salts, proposing a mechanism involving polyynes and acetylide intermediates. The obtained black, carbon-rich insoluble product is characterized by elemental analysis, the…
This paper examines whether infrared carbonyl absorption can characterize bond polarization and aromaticity in nonbenzenoid aromatic carbonyl compounds, focusing on tropone, diphenylcyclopropenone, and 3-ethylsydnone. The authors measured the positions and integral intensities of carbonyl bands in l…
The study examines how introducing a methyl substituent into the benzene ring affects the catalytic dehydrogenation kinetics of an ethyl side chain, using ethyltoluene conversion to vinyltoluene as the test reaction. Flow experiments on a mixed oxide catalyst measured product formation, hydrogen evo…
This study examines the low-temperature hydrothermal formation of crystalline sodium aluminosilicates from strongly alkaline gels with sodium oxide to alumina ratios of 4 to 6 and varying silica contents. More than 170 products synthesized at 70 to 200°C were characterized by X-ray diffraction, chem…
This study investigates the catalytic dehydrogenation of alkylphenols, a reaction for which the authors note little prior literature, with attention to producing phenols bearing unsaturated side chains. Butylphenol and isopropylphenol were passed at atmospheric pressure over copper chromium catalyst…
This paper examines vapor phase catalytic hydrogenation of 2-alkyl-5-acylfurans over platinum on carbon, focusing on reaction conditions that divert the process from phenol or cyclohexanone formation toward tetrahydropyran derivatives. The authors argue that initial hydrogenolysis of the furan ring …
This paper examines how cation type and reagent composition influence the formation, structure, stability, reduction, hydrolysis, and hydration of uranates. Drawing on chemical reactions of uranium oxides and uranyl salts with alkali and divalent metal compounds, together with X-ray diffraction, pot…
This study examines whether hydrogen peroxide evolved during atmospheric corrosion can serve as a quantitative indicator of oxide formation on magnesium and aluminum. Oxide-film growth was measured by optical polarization, while hydrogen peroxide evolution was measured photographically through calib…
This paper examines vibrational energy transfer in collisions between chemically active molecules, where conventional spherically symmetric interaction models give too small excitation cross sections. Using a model collision between a diatomic molecule and an atom capable of exchange reaction, it ar…
This paper examines how selected sections and projections can simplify the study of phase equilibria in multicomponent nickel systems, focusing on nickel-rich alloys within the Ni, Cr, W, Mo, Nb, Ti, Al system. The investigation reduces the seven-component system to a quasi-quaternary system consist…
The study investigates reactions of ketene with mercury compounds as a route to esters of mercurated acetic acids. It shows that ketene reacts with mercury alcoholates, with mercuric acetate in alcohols, and most conveniently with mercuric oxide in alcohol in the presence of mercuric acetate, formin…
This paper develops a thermal theory for the initiation of explosive decomposition under impact, emphasizing the formation of high-temperature sites by plastic deformation rather than by adiabatic compression or subcritical chemical heat release. Using elastoplastic compression of a thin disk betwee…
This study examines the reactions of ethylene with silicon hydrides in the presence of titanium tetrachloride under pressure and heating, focusing on telomerization with silicochloroform and methyldichlorosilane and polymerization with triethylsilane. Telomerization of ethylene with silicochloroform…
Solubility isotherms at 0°C were determined for the systems sodium borohydride, sodium chloride, water and sodium borohydride, sodium bromide, water, using 1% sodium hydroxide solution to suppress borohydride hydrolysis. Liquid and solid phases were analyzed by titration, Schreinemakers construction…
This study investigates the mechanism of cathodic reduction of allyl alcohol on platinized platinum electrodes in acidic and alkaline media. The authors combine polarization measurements, gas volume and chromatographic product analysis, adsorption studies, reactions with preadsorbed hydrogen, and su…
This study examines the fine structure of iron K absorption spectra in ferrocene and ferricinium chloride as a test of theoretical descriptions of electronic structure in aromatic metal complexes. Experimental spectra were recorded with a focusing reflection X-ray spectrograph and interpreted using …
This note analyzes isothermal distillation in a mixture of monodisperse pure water fog droplets and droplets of a dilute solution, driven by the difference in saturated water vapor concentration over the two droplet types. A system of kinetic equations for droplet radii and vapor density is formulat…
This paper investigates the use of P-amino acid derivatives of adenosine 5′-phosphate as activated intermediates for synthesizing nucleotide coenzymes and related diphosphate compounds. The authors prepare a stable triethylammonium salt of a phosphophenylalanine adenosine derivative, convert it to t…
This paper examines which stage controls the combustion rate of powders and explosives in a simplified multistage model involving reactions in the condensed-phase surface layer and in the gas or smoke-gas phase. It argues that the leading stage can shift with initial temperature or pressure, and der…
This paper examines whether redistribution of alloy components under a temperature gradient can be energetically favorable, independently of assumptions about differing atomic velocities in thermodiffusion. Considering a solid rod with limited impurity solubility, one part at a lower temperature and…
This paper examines why adsorption isosteres are often experimentally close to straight lines in coordinates of reciprocal temperature and logarithmic pressure, a behavior not generally implied by many adsorption isotherm equations. Using the thermal equations of potential theory for adsorbents of t…
This study examines the kinetics of catalytic dehydrogenation of ethylbenzene to styrene over a mixed oxide catalyst in a flow system with steam dilution. Experiments at 520 to 560°C measured styrene and hydrogen formation, determined relative adsorption coefficients for styrene and hydrogen from bi…
This study examines the interfacial polycondensation of pyridine-2,6-dicarboxylic acid dichloride with hexamethylenediamine to obtain a pyridine-containing polyamide, using benzene and aqueous alkaline media at room temperature with stirring. The authors describe polymer formation at the phase bound…
The study examines whether the aminonitrile rearrangement previously observed in the reaction of acrolein with unsymmetrical dialkylhydrazines also occurs with related unsaturated carbonyl compounds. Condensation reactions of crotonaldehyde, alpha-methylacrolein, and methyl vinyl ketone with dimethy…
This paper examines the preparation and properties of beta,beta,beta-trichloroethyl esters of several trivalent arsenic acids, including arsenous, ethylarsinous, phenylarsinous, and diphenylarsinous acids. The authors show that transesterification of existing arsenite or arsinite esters with beta,be…
This paper examines the structures of complex silicon oxygen anions in barium silicates, especially high temperature barium metasilicate and the compound 2BaO·3SiO2, using infrared absorption spectra supplemented by comparison with known lattice periods and related silicate structures. The spectrum …
This paper reports experiments on the polymerization of tetracyanoethylene, a tetrasubstituted ethylene normally resistant to radical-chain polymerization because of steric hindrance. The authors test alcohols, phenol, amines, amides, and related compounds as initiators at 200 degrees C, finding tha…
This study examines the adsorption behavior of hydrogen ions at negatively charged mercury, electrolyte interfaces by comparing double-layer differential capacitance and anion electroreduction kinetics in acidic and alkali-metal salt solutions. Measurements on a dropping mercury electrode in hydroch…
This paper reports a stereospecific synthesis of the pyrrolizidine alkaloid 1-methylenepyrrolizidine from natural L-proline in order to determine its absolute configuration and relate it to other pyrrolizidine bases. The route proceeds through ethyl L-prolinate, Michael addition to methyl acrylate, …
This paper addresses the difficulty of applying extraction photometry to colored complexes formed by arsenazo and thoron group reagents, whose water solubility and ionic character had previously limited their use to aqueous photometric determinations. The authors propose extraction systems based on …
This study examines the sequence of side product formation during liquid phase oxidation of cumene to cumene hydroperoxide under conditions close to industrial practice. Cumene was oxidized with air at 115 degrees C in a bubbling reactor, and hydroperoxide, peroxide, acetophenone, and dimethylphenyl…
This paper examines the structural interpretation of hydrated and anhydrous uranates, arguing against models based on discrete hydroxo-aqua or polynuclear uranate ions when they neglect crystallographic evidence from anhydrous compounds. On the basis of X-ray investigations and comparison with known…
This communication reports the preparation and reactivity of selenium analogs of previously studied chlorothiophosphoryl compounds, focusing on diethyl-Se-chloroselenophosphate. The compound is generated by chlorination of triethyl selenophosphate with sulfuryl chloride in benzene at low temperature…
This study examines whether the tetrahydrofuran ring can be dehydrogenated to a furan ring under conditions where competing isomerization to aliphatic carbonyl compounds is known to dominate on platinum. Using 2-methyltetrahydrofuran as a model substrate, the authors tested rhodium, osmium, iridium,…
This study examines complexes formed by asymmetrical diphenylethylene with tin tetrachloride, phenyltin trichloride, and diphenyltin dichloride, motivated by the role of tin halides in cationic polymerization. Electronic spectroscopy, infrared spectroscopy, and dielectric polarization measurements w…
This paper examines the products formed when rare-earth element salts react with alkali-metal citrates at a 1:1 metal to citrate ratio, a case previously treated as simple citrate precipitation. Using precipitation tests, pH variation, analytical composition measurements, and tracer experiments with…
