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Общее количество найденных документов : 74
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1.
Инвентарный номер: нет.
   
   D 49


   
    Development of certified reference samples of solutions of trihalomethanes [Electronic resource] / V. E. Kirichenko, M. G. Pervova, K. I. Pashkevich, I. A. Piterskikh // Journal of Analytical Chemistry. - 2000. - Vol. 55, N 3. - P221-226
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Journal of Analytical Chemistry\\2000, V. 55, N 3, p. 221.pdf
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2.
Инвентарный номер: нет.
   
   C 41


   
    Certified reference samples of tetrachloromethane, tetrachloroethylene, and chlorophenol solutions [Electronic resource] / I. A. Piterskikh, V. E. Kirichenko, M. G. Pervova, K. I. Pashkevich // Journal of Analytical Chemistry. - 2000. - Vol. 55, N 3. - P227-230
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

\\\\Expert2\\nbo\\Journal of Analytical Chemistry\\2000, V. 55, N 3, p. 227.pdf
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3.
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   A 53


   
    An Unusually easy oxidative dequaternization of N-alkyl-1,2,4-triazinium salts [Electronic resource] / O. N. Chupakhin, B. V. Rudakov, P. McDermott, S. G. Alexeev, V. N. Charushin, F. Hegarty // Mendeleev Communications. - 1995. - Vol. 5, № 3. - P104-105
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Unusually easy dequaternization has been found to occur on treatment of 1-alkyl-3-morpholino-5-phenyl-1,2,4-triazinium iodides with triethylamine in alcohol or acetone solutions at room temperature; a plausible reaction mechanism has been advanced on the basis of NMR and kinetic studies

\\\\expert2\\nbo\\Mendeleev Communications\\1995, v.5, N 3. p.104.pdf
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4.
Инвентарный номер: нет.
   


   
    5(6)-Fluoro-6(5)-R-benzofuroxans: synthesis and NMR 1H, 13C and 19F studies [Text] / S. K. Kotovskaya, S. A. Romanova, V. N. Charushin, M. I. Kodess, O. N. Chupakhin // Journal of Fluorine Chemistry. - 2004. - Vol. 125, № 3. - P421-428 : ил. - Библиогр.: с. 428 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,6-DIFLUOROBENZOFUROXAN -- NUCLEOPHILIC SUBSTITUTION -- X-RAY CRYSTALLOGRAPHY
Аннотация: 5(6)-Fluoro-6(5)-substituted benzofuroxans were obtained by the reactions of 5,6-difluorobenzofuroxan with a number of nucleophiles, such as alkylamines, cycloalkylimines, sodium azide and sodium alkoxides. The features of tautomerism in the series of asymmetrical 5(6)-fluorobenzofuroxans in acetone solutions have been studied by 1H, 13C and 19F NMR.????

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2004, v.125, p.421.pdf
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5.
Инвентарный номер: нет.
   
   M 57


   
    Mercury sorption on a thiocarbamoyl derivative of chitosan [Text] / K. C. Gavilan, A. V. Pestov, H. M. Garcia, Yu. G. Yatluk, J. Roussy, E. Guibal // Journal of Hazardous Materials. - 2009. - Vol. 165, № 1-5. - P415-426
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The grafting of thiourea on chitosan backbone allows synthesizing a thiocarbamoyl derivative that was very efficient for mercury sorption in acidic solutions. Though the sorption capacity is not increased compared to raw chitosan in near neutral solutions, this modification allowed maintaining high sorption capacity (close to 2.3 mmol Hg g-1) at pH 2. Mercury sorption in acidic solutions is not affected by the presence of competitor metals (such as Zn(II), Pb(II), Cu(II), Cd(II), Ni(II)) or the presence of nitrate anions (even at concentration as high as 0.8 M)). The presence of chloride or sulfate anions (0.8 M) decreased Hg(II) sorption capacity to 1 mmol Hg g-1. Kinetics are controlled by a combination of pseudo second-order reaction rate and resistance to intraparticle diffusion. Mercury desorption reached about 75% using thiourea (in HCl solution)

\\\\Expert2\\nbo\\Journal of Hazardous Materials\\2009, v.165.p.415.pdf
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6.
Инвентарный номер: нет.
   
   R 30


   
    Steric structure of alkyl 2-aryl(hetaryl)hydrazono-3-fluoroalkyl-3-oxopropionates [Electronic resource] / E. V. Shchegol'kov, Ya. V. Burgart, O. G. Khudina, V. I. Saloutin, O. N. Kazheva, A. N. Chekhlov // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2009. - Vol. 45, № 6. - P801-809
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Steric structure of fluorinated 2-arylhydrazono-3-oxo esters was studied by 1H, 19F, and 13C NMR spectroscopy and X-ray analysis. It was found that these compounds in the crystalline state and in solutions in acetone-d 6, DMSO-d 6, and CDCl3 exist as Z isomers with the ester fragment involved in intramolecular hydrogen bond with the hydrazone NH proton. Exceptions are alkyl 2-arylhydrazono-4,4-difluoro-3-oxobutanoates which exist in acetone-d 6 as mixtures of Z and E isomers, the former prevailing. Unlike fluorinated analogs, ethyl 2-(4-methylphenyl)hydrazono-3-oxobutanoate in crystal has the structure of E isomer in which intramolecular hydrogen bond is formed between the NH proton and acetyl carbonyl group. The same compound in acetone-d 6, DMSO-d 6, and CDCl3 gives rise to a mixture of Z and E isomers, the latter prevailing

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2009, 45 (6), 801.pdf
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7.
Инвентарный номер: нет.
   
   S 53


    Shcherbakov, K. V.
    Transformations of 5,6,7,8-tetrafluoro-2-ethoxycarbonylchromone under the action of primary amines [Electronic resource] / K. V. Shcherbakov, Ya. V. Burgart, V. I. Saloutin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2009. - Vol. 45, № 5. - P766-772
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
5,6,7,8-TETRAFLUORO -- CHROMONES
Аннотация: 5,6,7,8-Tetrafluoro-2-ethoxycarbonylchromone in aprotic polar solutions formed by nucleophilic aromatic ipso-substitution 7-alkyl(aryl)amino-5,6,8-trifluorochromones. This transformation in ethanol depended on the reactivity of the acting amine: with stronger nucleophiles, aliphatic amines, an opening of the ?-pyrone ring occurred, with aromatic amines 7-monosubstituted chromones were the main products, and the open-chain esters formed in lesser amount

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2009, 45 (5), 766.pdf
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8.
Инвентарный номер: нет.
   
   P 49


    Pestov, A. V.
    Synthesis in a gel as a new procedure for preparing carboxyethyl chitosan [Electronic resource] / A. V. Pestov, N. A. Zhuravlev, Yu. G. Yatluk // Russian Journal of Applied Chemistry. - 2007. - Vol. 80, № 7. - P1154-1159. - Bibliogr. : p. 1159 (14 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: A fundamentally new procedure of synthesis of carboxyethyl chitosan in a physical gel, ensuring higher degree of substitution at lower temperatures and lower consumption of time and chemicals, compared to the existing procedures, was developed. The structure of the resulting products was examined by diffuse reflection IR and 1H NMR spectroscopy in solutions and also 1H and 7Li broad line NMR

\\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2007, v. 80, N. 7, p.1154.pdf
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9.
Инвентарный номер: нет.
   
   R 30


   
    Reaction of polyfluoro-3-chloro(bromo)-1-butenes with sodium hypohalites and properties of epoxides derived therefrom [Electronic resource] / A. Ya. Zapevalov, V. I. Filyakova, M. I. Kodess, V. I. Saloutin // Russian Journal of Organic Chemistry (Translation of Zhurnal Organicheskoi Khimii). - 2003. - Vol. 39, № 7. - P919-923. - Bibliogr. : p. 923 (13 ref.)
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
DERIVATIVE -- CARBON -- CESIUM -- EPOXIDE -- HYPOHALITES -- SODIUM HYPOHALITES
Аннотация: Epoxidation of 3-chloro(bromo)heptafluoro-1-butenes and 3,4-dichlorohexafluoro-1-butene with aqueous solutions of sodium hypohalites is accompanied by cleavage of the carbon skeleton at the double bond and formation of polyfluorocarboxylic acid sodium salts as by-products. 3-Chloro(bromo)-1,2- epoxyheptafluoro- and 3,4-dichloro-1,2-epoxyhexafluorobutanes were synthesized and subjected to isomerization into carbonyl compounds by the action of cesium fluoride or antimony pentafluoride.

\\\\Expert2\\nbo\\Russian Journal of Organic Chemistry\\2003, 39 (7), 919.pdf
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10.
Инвентарный номер: нет.
   


   
    3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine and its N-mono-and N,N-dicarboxyethyl derivatives: synthesis, protolytic and complexation properties [Electronic resource] / V. Yu. Korotaev, Yu. A. Skorik, A. Yu. Barkov, M. I. Kodess, A. Ya. Zapevalov // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2005. - Vol. 54, № 11. - P2545-2549
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3,3,3-Trifluoro-N-(3-trifluoromethylphenyl)-1,2-propanediamine (5) was synthesized by the reaction of 2-diazo-1,1,1-trifluoro-3-nitropropane or 3,3,3-trifluoro-1-nitropropene with 3-aminobenzotrifluoride followed by the reduction of the nitro group. The Michael 1,4-addition of diamine 5 to acrylic acid occurs only at the N(1) atom and affords N-mono-or N,N-dicarboxyethyl derivatives 6 and 7, depending on the reactant ratio. Protolytic equilibria 5–7 in aqueous solutions were studied by pH-potentiometry and UV spectroscopy. Only the aliphatic amino group can be protonated in an aqueous solution, while the aromatic amino group remains unprotonated even in 12 M HCl. The stability constants of transition metal (Cu2+, Ni2+, Zn2+) complexes with ligands 5–7 were determined by pH-potentiometric titration. The stability of the complexes and selectivity of the ligands toward Cu2+ ions increase with an increase in the number of N-carboxyethyl groups

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\2005, 54 (11), 2545.pdf
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