scispace - formally typeset
Search or ask a question

Showing papers in "Russian Chemical Bulletin in 1967"


Journal ArticleDOI
TL;DR: In this paper, the activation energy and exponential factor of the rate constant of the reaction of nitrogen atoms with ethylene were determined at various temperatures in the range 291 −523°K.
Abstract: 1. The absolute values of the rate constant of the reaction of nitrogen atoms with ethylene were measured at various temperatures in the range 291–523°K. 2. The activation energy and preexponential factor of the rate constant of the reaction of nitrogen atoms with ethylene were determined. 3. Hydrocyanic acid, formed in the reaction of nitrogen atoms with ethylene, is one of the reaction products of the primary event.

27 citations


Journal ArticleDOI
TL;DR: In this article, a short-lived optical absorption (maximum at 450 mμ due to the HSO4 (or SO4−) radical has been detected using the method of pulse radiolysis in irradiated aqueous solutions of sulfuric acid.
Abstract: 1. Using the method of pulse radiolysis in irradiated aqueous solutions of sulfuric acid, a short-lived optical absorption (maximum at 450 mμ due to the HSO4 (or SO4−) radical has been detected. The molar extinction coefficient of this product (∼1000 liter/mole · cm) and the velocity constant of the reaction between the OH radical and the HSO4− (or SO42−) ion (∼106 liter/mole · sec) have been evaluated.

20 citations


Journal ArticleDOI
TL;DR: It can be inferred from experimental data that the most active rare-earth oxides should have good catalytic properties in other oxidation processes as discussed by the authors, and rare earth oxides with high oxygen mobilities display maximum activity towards hydrogen oxidation.
Abstract: 1. Rare-earth oxides with high oxygen mobilities display maximum activity towards hydrogen oxidation. 2. It can be inferred from our experimental data that the most active rare-earth oxides should have good catalytic properties in other oxidation processes.

20 citations



Journal ArticleDOI
TL;DR: A structurally modified state of water and of a number of other polar liquids, arising under dynamic conditions of condensation of incompletely saturated vapors in quartz capillaries, was detected in this article.
Abstract: 1. A structurally modified state of water and of a number of other polar liquids, arising under dynamic conditions of condensation of incompletely saturated vapors in quartz capillaries, was detected. 2. Structurally modified liquids are distinguished by increased density and viscosity, increased saturated vapor pressure, and a different course of the thermal expansion and phase transformations. 3. The possible causes of the formation of a structurally modified state of liquids were discussed.

9 citations


Journal ArticleDOI
TL;DR: In this article, the thermal decomposition of ozone was studied within the temperature interval 136-226°C and the experimental data were explained by the following reaction mechanism O3+M⇌O2+O+M O+O3=O2 +O2+,
Abstract: 1. The thermal decomposition of ozone was studied within the temperature interval 136–226‡. 2. The experimental data were explained by the following reaction mechanism O3+M⇌O2+O+M O+O3=O2+O2 3. The rate constant of the latter process k=(2.9±0.9) ·1012.e(−3700±300)/RT, cm3-mole−1· sec−1, was meastured.

7 citations


Journal ArticleDOI
TL;DR: The dianions of the dicarbadodecaboranes (14) form barenes when treated with oxidizing agents as discussed by the authors, and the transfer of two electrons to the barenes or neobarenes are treated with aromatic anion-radicals of the type of naphthalenesodium in tetrahydrofuran solution.
Abstract: 1. Neobarenes are isomerized to barenes via the dianions of the dicarbadodecaboranes (14), in which connection the isomerization must be regarded as being a three-step process: a) reduction, b) isomerization of the dianion, and c) oxidation. 2. The dianions of the dicarbadodecaboranes (14) form barenes when treated with oxidizing agents. 3. The rapid addition of two equivalents of the metal occurs when the neobarenes are treated with alkali metals in liquid ammonia, with the formation of the adduct (m-B10H10C2RR′)2M, which is easily isomerized to the adduct (o-B10H10C2RR′)2M. 4. The transfer of two electrons to the barene or neobarene nucleus occurs when the barenes or neobarenes are treated with aromatic anion-radicals of the type of naphthalenesodium in tetrahydrofuran solution, with the formation of the dianions.

5 citations


Journal ArticleDOI
TL;DR: In this paper, the structure of the cyclic product formed by the action of boron trifluoride on acrolein diethyl acetal was proved and a scheme was proposed for the trimerization of the acetal.
Abstract: The structure of the cyclic product formed by the action of boron trifluoride on acrolein diethyl acetal is proved This results confirm the scheme proposed earlier for the trimerization of the acetal

5 citations




Journal ArticleDOI
TL;DR: In this article, the influence of the ratios of the components, conditions of precipitation and calcination upon the phase composition, specific surface, and dry specific gravity of the mixed oxides NiO-ZnO were studied.
Abstract: 1. The influence of the ratios of the components, conditions of precipitation and calcination upon the phase composition, specific surface, and dry specific gravity of the mixed oxides NiO-ZnO were studied. 2. Standardization of the conditions of preparation permitted us to achieve reproducibility of the composition and properties of the coprecipitated oxides and reduced catalysts Ni-ZnO obtained from them.

Journal ArticleDOI
TL;DR: In this paper, a Fischer reagent in which methanol is replaced by N,N′-dimethylformamide is proposed, which permits the reliable determination of water in various substances, including carbonyl compounds and strong acids.
Abstract: 1. A Fischer reagent in which methanol is replaced by N,N′-dimethylformamide is proposed. 2. The proposed reagent permits the reliable determination of water in various substances, including carbonyl compounds and strong acids, but is not suitable for the determination of water in compounds containing active hydrogen. 3. Many organic compounds, including carbonyl-containing compounds, can be used as solvents for the substance to be analyzed.



Journal ArticleDOI
TL;DR: The isomerization of 1-methyldicyelopentadiene (III) to 8 methyldicylopentadene (IV) at 145° takes place only by an intramolecular mechanism as discussed by the authors.
Abstract: 1. The isomerization of 1-methyldicyelopentadiene (III) to 8-methyldicyclopentadiene (IV) at 145° takes place only by an intramolecular mechanism. 2. Depending on the reaction conditions, the diene synthesis can go by two different mechanisms: one-step and two-step.

Journal ArticleDOI
TL;DR: In this paper, the decomposition of 2,3,4,6,6tetra-O-methyl-β,methyl-D-galactopyranoside and that of the previously studied 2, 3, 4, 6, 6-Tetra O-methyl,α,methyl,D-glucopyranoide proceed practically identically.
Abstract: The decomposition of 2,3,4,6-tetra-O-methyl-β-methyl-D-galactopyranoside and that of the previously studied 2,3,4,6-tetra-O-methyl-α-methyl-D-glucopyranoside proceed practically identically. This makes it possible to use the mass spectrometric data obtained for one methylated methylglucoside for the identification of its epimers as well.

Journal ArticleDOI
TL;DR: In this article, a method for obtaining mercapto derivatives of the barenes by the action of sulfur on metal (Li, Na, K) derivatives in liquid ammonia has been proposed.
Abstract: 1. A method for obtaining mercapto derivatives of the barenes by the action of sulfur on metal (Li, Na, K) derivatives of the barenes in liquid ammonia has been proposed. 2. Barene disulfides have been obtained from barene mercapto derivatives. 3. Hydrogen peroxide in acetic acid readily oxidizes the boron skeleton of B9H11C2RR′ to boric acid.

Journal ArticleDOI
TL;DR: The photochemical reactions of hydrogen sulfide with tetrafluoroethylene and vinyldene fluoride lead to the formation of the corresponding fluorine-containing thiols and sulfides together with telomerization products as mentioned in this paper.
Abstract: 1. The photochemical reactions of hydrogen sulfide with tetrafluoroethylene and vinyldene fluoride lead to the formation of the corresponding fluorine-containing thiols and sulfides together with telomerization products 2. Orientation in the addition of hydrogen sulfide to unsymmetrical fluoro olefins is examined.

Journal ArticleDOI
TL;DR: In this paper, the picture of complex formation in the binary systems of nitric acid and carboxylic acids was investigated qualitatively, and it was shown that the dimers (HONO2)2 break down, and complexes of the type HNO3 · RCOOH are formed.
Abstract: 1. The picture of complex formation in the binary systems nitric acid -carboxylic acids was investigated qualitatively. 2. As nitric acid is diluted with carboxylic acids, the dimers (HONO2)2 break down, and complexes of the type HNO3 · RCOOH are formed.

Journal ArticleDOI
TL;DR: In this paper, the dissociation constants of eight fluorine-containing propylamines were determined and the results obtained were correlated with the Taft substituent constant and compared with the literature data.
Abstract: 1. The dissociation constants of eight fluorine-containing propylamines was determined. 2. The results obtained were correlated with the Taft substituent constant and compared with the literature data. 3. The constants ξ* from the equations derived for nonhalogen-containing amines are not applicable to the equations for the amines containing halogens.


Journal ArticleDOI
TL;DR: The thermal polymerization of p-diethynylbenzene leads to the formation of polymers with high electric conductivity with an activated energy of 0.10−0.17 eV.
Abstract: 1. The thermal polymerization of p-diethynylbenzene (100–185‡) leads to the formation of polymers with high electric conductivity (σ300‡K=1.0–10−2 ohm−1 · cm−1), with an activated energy of 0.10–0.17 eV. 2. On the basis of the IR and x-ray spectra, as well as the data of elementary analysis, a hypothesis was advanced on the structure of the polymers obtained.


Journal ArticleDOI
TL;DR: Using a new rapid method, K2O, Na 2O, CaO, MgO, Al2O3, and Fe 2O3 were determined in silicates according to a single procedure from a single sample.
Abstract: Using a new rapid method, K2O, Na2O, CaO, MgO, Al2O3, and Fe2O3 were determined in silicates according to a single procedure, from a single sample.

Journal ArticleDOI
TL;DR: In this paper, a mechanism of oxidation, explaining the experimentally observed ratio of the rates of accumulation of the products, was proposed; according to this mechanism, the basic direction of the reaction of the peroxide radical is its interaction with the carbonyl group of glyceraldehyde.
Abstract: 1. The intermediates in the oxidation of glyceraldehyde in aqueous medium are glycolic aldehyde and methylglyoxal, while the final products are glyceric, glycolic, acetic, and formic acids and carbon dioxide. 2. A mechanism of oxidation, explaining the experimentally observed ratio of the rates of accumulation of the products, was proposed; according to this mechanism, the basic direction of the reaction of the peroxide radical is its interaction with the carbonyl group of glyceraldehyde.

Journal ArticleDOI
TL;DR: The cleavage of tetrahydrofuran (THF) by acetyl bromide does not require catalysis using hydrogen bromides or other acid as discussed by the authors.
Abstract: 1. The cleavage of tetrahydrofuran (THF) by acetyl bromide does not require catalysis using hydrogen bromide or other acid. 2. Acetic anhydride is capable of cleaving certain compounds of the THF series under the catalytic influence not only of mineral acids, but also of weaker donors of protons, namely organic acids. 3. The cleavage of the tetrahydrofuran ring in 2-phenyl-tetrahydrofuran using acetyl bromide goes with the formation of only one structural isomer. The action of acid halides on tetrahydrofurfuryl acetate and tetrahydrofurfuryl halides leads to a mixture of isomers.

Journal ArticleDOI
TL;DR: In this paper, a method was developed for the synthesis of hydroxy carboxylic acids by the addition of saturated alcohols and acids to 10-undecenoic acid and 10undecen-1-ol.
Abstract: A method was developed for the synthesis of hydroxy carboxylic acids by the addition of saturated alcohols and acids to 10-undecenoic acid and 10-undecen-1-ol.


Journal ArticleDOI
TL;DR: In this paper, trans-3-Phosphonocrotonic triesters were synthesized by the addition of triethyl phosphite to tetrolic acid and by the action of 3-chlorocronic and 3chloroisocrocronic esters on triethylosphite.
Abstract: 1. cis- and trans-3-Phosphonocrotonic triesters were synthesized by the addition of triethyl phosphite to tetrolic acid and by the action of 3-chlorocrotonic and 3-chloroisocrotonic esters on triethyl phosphite. 2. The configurations of the phosphonocrotonic triester isomers were established by comparing the constants of these esters with the constants ofα andβ-phosdrin and by the analysis ofIR and PME spectra.

Journal ArticleDOI
TL;DR: In this paper, a new method has been developed for the synthesis of high molecular aromatic polyimides, a one-step high-temperature polycyclization in solution, which substantially simplifies the synthesis and their application.
Abstract: 1. A new method has been developed for the synthesis of high molecular aromatic polyimides — a one-step high-temperature polycyclization in solution, which substantially simplifies the synthesis of such polymers and their application. 2. An idea of the molecular weights and coefficient of polydispersion of polyimides was obtained for the first time, with soluble polydiphenylenphthalidepyromellitimide as an example. 3. Certain physicochemlcal properties of polyimides of anilinephthalein and anilinephthaleinimide were studied, and it was shown that these polymers possess a valuable complex of properties: high mechanical indices, excellent thermal stability, which in conjunction with the good solubility of these polyimides, makes them extremely promising for practical utilization. 4. The question of the influence of various structural factors upon the solubility of polyimides was discussed, and it was shown that the solubility of polyimides of anilinephthalein and anilinephthaleinimide is due to the large size of the phthalide and phthalimidine side groups and to their polarity.