Sorption of water vapor on cation-substituted vermiculite

Deformations of Na, Ca, and Ba vermiculites upon sorption of water vapor have been determined by a dilatometric method. Sequential stages in the hydration of interlayer exchange cations have been identified. The experimental results have been compared with data obtained in studies using adsorptive, calorimetric, and x-ray methods.Institute of Physical Chemistry, Russian Academy of Sciences, 117915 Moscow. Institute of Colloid Chemistry and the Chemistry of Water, Academy of Sciences of the Ukraine, Kiev. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 34–39, January, 1992.     

Construction of crystal structure sections using the clat software package

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Physical Chemistry, Polish Academy of Sciences. Translated fromZhurnal Struktumoi Khimii, Vol. 36, No. 5, pp. 956–959, September–October, 1995.     

Electronic structure of molecules of substituted benzenes by X-ray spectroscopy. I. Nitrobenzene

Institute of Inorganic Chemistry, Academy of Sciences of the USSR, Siberian Branch. Institute of Organic Chemistry, Academy of Sciences of the USSR, Siberian Branch. Translated from Zhurnal Strukturnoi Khimii, Vol. 28, No. 5, pp. 73–80, September–October, 1987.     

Kinetics of metal ion sorption on clinoptilolite

From an investigation into the sorption kinetics of Na⁺, K⁺, and Sr²⁺ ions from standard solutions on finely dispersed clinoptilolite incorporated in a highly permeable inert polyacrylamide gel we have determined the characteristic kinetic size of clinoptilolite and the diffusion coefficients for Na⁺, K⁺, and Sr²⁺ in the clinoptilolite microcrystallites and transport pores. Diagrams have been constructed to enable a valid selection of kinetic models for sorption of the ions from any solutions on clinoptilolite.Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok. V. I. Vernadskii Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 117975 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 273–277, February, 1992.     

Triterpene glycosides of Scabiosa soongorica. V. β-Sitosterol β-D-glucopyranoside and songoroside A

Institute of Organic Chemistry, Academy of Sciences of the Kirgiz SSR, Frunze. Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 885–886, November–December, 1988.     

Refinement of the crystal and molecular structure of 4-phenylthiosemicarbazide diacetic acid monohydrate

Institute of Applied Physics, Academy of Sciences, Moldova Republic. Institute of Chemistry, Academy of Sciences, Moldova Republic. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 3, pp. 154–158, May–June, 1994.     

Thermodynamic description of sorption processes in swelling systems

The thermodynamics of sorptive moistening of various types of swelling sorbents have been analyzed. The energy and entropy characteristics of the sorbed substance have been calculated.Institute of Physical Chemistry, Russian Academy of Sciences, Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 29–33, January, 1992.     

Quantum chemistry and spectroscopy of highly excited states of coordination compounds

Institute of Inorganic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Institute of Catalysis, Siberian Branch, Academy of Sciences of the USSR. Institute of Chemistry and Chemical Technology, Siberian Branch, Academy of Sciences of the USSR. Branch of the Institute of Chemical Physics, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 29, No. 6, pp. 90–103, November–December, 1988.     

Development of the catalytic synthesis of compounds of the quinoline series (the N. S. Kozlov reaction) (Review)*

This article is dedicated to the 80^th anniversary of the Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus (in 1929-1959 the Institute of Chemistry, Academy of Sciences of the BSSR). It contains a review of the advances in the synthesis and properties of condensed heterocyclic systems containing a quinoline fragment – derivatives of quinaldine, benzo[f]quinoline, indeno- and indoloquinoline, benzo[a]phenanthridine, benzoacridine, tetrahydroquinoline, 1,7- and 4,7-phen-anthroline. The reactions forming the basis of the synthesis of the heterocycles are described – catalytic reaction of amines with acetylene, catalytic condensation of azomethines with methyl and α-methylene ketones, triple-component condensation of arylamines, carbonyl compounds, and CH acids.     

Synthesis of 4-trifluoromethyl-7-hydroxycoumarin derivatives. Structure of 3-cyano-4-trifluoromethyl-7-acetoxycoumarin

A method was developed for the production of derivatives of 4-trifluoromethyl-7-hydroxycoumarin with electron-withdrawing groups (CN, CF₃CO) at position 3. The structure of 3-cyano-4-trifluoromethyl-7-acetoxycoumarin was proved by x-ray crystallographic investigation. The effect of the substituents on the geometry of the molecule is discussed.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. A. N. Nesmeyanov Institute of Heteroorganic Compounds, Russian Academy of Sciences, 117813 Moscow. Institute of Biochemistry, Academy of Sciences of Armenia, 375044 Erevan. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 6, pp. 1371–1375, June, 1992.     

Coordinated diaminoguanidinium(1+) ion in the crystal structure of the [Cu(CH8N5)Cl3] complex

Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Organoelement Compounds, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 36, No. 5, pp. 936–941, September–October, 1995.     

Molecular structure of 10,10-dimethyl-7H-pyrano[4′,3′:4,5]thieno[3,2-e]-(1,2,4)-triazolo[2,3-e]pyrimidine

Institute of Fine Organic Chemistry, Armenian Academy of Sciences. A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 5, pp. 197–199, September–October, 1994.     

Electrohydraulic effect in heterodisperse water-plant systems. II. Chemical nature of the suspended particles

On the basis of the results of acid hydrolysis, chromatographic analysis of the hydrolysates, and a study of IR spectra, it has been established that the suspended particles liberated under the action of electrohydraulic shocks on heterodisperse water—plant systems consist of small fragments of the lignocarbohydrate complex of the plant tissue.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. FAX (3712) 62 73 48. Division of Wood Chemistry, Irkutsk Institute of Organic Chemistry, Siberian Division of the Russian Academy of Sciences. Institute of Solar and Terrestrial Physics, Siberian Division of the Russian Academy of Sciences, Irkutsk, FAX (395-3) 46 25 57. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 435–439, May–June, 1994.     

Crystal and molecular structure of 1-(2′-methoxyphenyl)-3,7,10-trimethylstannatrane

A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences. Irkutsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated fromZhurnal Strukturnoi Khimii, Vol. 35, No. 5, pp. 199–203, September–October, 1994.     

Crystal and molecular structures of methyl (2-hydroxy-3-oxo-5-p-tolyl-2,3-dihydrofuran-2-yl)acetate

Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences. Institute of Technical Chemistry, Russian Academy of Sciences. A. M. Gorkii Perm State University. Translated fromZhurnal Struktumoi Khimii, Vol. 36, No. 5, pp. 952–956, September–October, 1995.     

Isolation of an indanone fromEquisetum arvense and its crystal and molecular structure

Summary From the herbEquisetum arvense L. an indanone compound has been isolated for the first time for which the structure of 4-hydroxy-6-(2-hydroxyethyl)-2,2,5,7-tetramethylindanone has been established by spectroscopy and x-ray structural analysis.Irkutsk Institute of Organic Chemistry, Siberian Branch of the Academy of Sciences of the USSR. Institute of Applied Chemistry, Academy of Sciences of the Moldavian SSR, Kishinev. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 508–513, July–August, 1978.     

Carbohydrates of cultivated varieties ofAlthea rosea

The polysaccharides of three cultivated varieties ofAlthea rosea have been investigated. The amounts of water-soluble polysaccharides and pectin substances in various organs of the plant have been determined. It has been shown that the maximum amount of water-soluble polysaccharides and pectin substances is present in the flowers. Their monosaccharide compositions have been studied. The physicochemical characteristics of the pectin substances are given.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent. A. Sadykov Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan. Tashkent. Institute of Botany, Academy of Sciences of the Republic of Uzbekistan, Tashkent. Translated from Khimiya Prirodnykh Soedineii, No. 5, pp. 643–646, September–October, 1993.     

Adsorption studies of organosubstituted laminar silicates. 1. Adsorption deformation of organosubstituted laminar silicates

A dilatometric method was used to determine the deformations of organosubstituted Pyzhevsk montmorillonite and synthetic fluorohectorite upon the adsorption of water, hexane, and benzene vapor. These results were compared with the adsorption calorimetry data. The dilatometric method was shown to be highly sensitive to structural changes of the laminar silicates.Institute of Physical Chemistry, Russian Academy of Sciences, 117915 Moscow. Institute of Colloid Chemistry and Water Chemistry, Academy of Sciences of the Ukraine, 252180 Kiev. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 9, pp. 1979–1986, September, 1992.     

Alkaloids ofThalictrum sachalinense. V

Summary Glaucine, N-methylnantenine, thalrugosine, magnoflorine, berberine, and the unidentified bases (II) and (III) have been obtained from the roots and rhizomes ofThalictrum sachalinense. The main alkaloid in the combined bases of the roots and rhizomes was magnoflorine.Intitute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Pacific Ocean Institute of Bioorganic Chemistry, Far Eastern Scientific Center of the Academy of Sciences of the USSR, Vladivostok. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 594–597, September–October, 1978.