Главная Новые поступления Описание Шлюз Z39.50

Базы данных


Труды сотрудников Института органического синтеза УрО РАН - результаты поиска

Вид поиска

Область поиска
в найденном
 Найдено в других БД:Каталог книг и продолжающихся изданий (2)Труды Института высокотемпературной электрохимии УрО РАН (2)Труды сотрудников Института химии твердого тела УрО РАН (2)Расплавы (4)Публикации Чарушина В.Н. (5)
Формат представления найденных документов:
полныйинформационныйкраткий
Отсортировать найденные документы по:
авторузаглавиюгоду изданиятипу документа
Поисковый запрос: (<.>K=CF<.>)
Общее количество найденных документов : 27
Показаны документы с 1 по 10
 1-10    11-20   21-27 
1.
Инвентарный номер: нет.
   
   M 38


   
    Mass spectrometry study of the pyrolysis of perfluoroolefin oxides [Electronic resource] / N. D. Kagramanov, A. A. Kutin, N. V. Peschanskii, A. Ya. Zapevalov, L. S. German // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1991. - Vol. 40, № 7. - P1321-1325
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The pyrolysis of perfluoroolefin oxides has been studied by gas chromatography/mass spectrometry at 400–700°C, in a current of He (110 dilution, contact time 1 sec). For oxides containing a terminal CF2 group, the sole degradation route is through the elimination of difluorocarbene. Pyrolysis of symmetrical disubstituted oxides results in the elimination of a perfluoroalkylfluorocarbene, which subsequently isomerizes to the corresponding perfluoroolefin. In the pyrolysis of unsymmetric disubstituted oxides the elimination of perfluoroalkylfluorocarbenes occurs by both of the possible routes. Trisubstituted oxides eliminate bis-perfluoroalkylcarbenes. The decomposition of tetrasubstituted oxides proceeds along several directions concurrently

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1991, 40 (7), 1321.pdf
Найти похожие

2.
Инвентарный номер: нет.
   
   A 53


   
    An efficient synthesis of alkylfluoroalkylketones [Text] / O. G. Khomutov, V. I. Filyakova, A. V. Kutchin, K. I. Pashkevich // Journal of Fluorine Chemistry. - 1992. - Vol. 58, № 2-3. - P161
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Interaction of fluoroacyl chlorides with lithium tetraalkylaluminates II prepared by the hydroalumination of alkenes I results in fluorinated ketones III with yields of 65–70%.??RF = CF3, H(CF2)2, C4F9, C6F13 R1 = C3H7, C4H9, C6H13, C7H15??The reaction is simple and does not require an argon atmosphere, as is needed for most reactions of organoaluminum compounds????

Найти похожие

3.
Инвентарный номер: нет.
   
   C 74


   
    Complexes of crown ethers with perfluorocarboxylic acids and their thermal decarboxylation [Electronic resource] / A. V. Podol'skii, T. G. Khonina, O. V. Koryakova, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1993. - Vol. 42, № 6. - P1052-1055
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Crown ethers form strong proton-acceptor complexes with CF3COOH or C4F9COOH that undergo thermal decarboxylation at 200–260 °C which results in 60–80% of CF3H or C4F9H (including up to 20 % of a mixture of C4F8). Critical parameters of the process were determined in relation to the temperature and amount of crown ether. The relative activities of different crown ethers in decarboxylation were also established. A scheme is proposed that explains the effect of the structure of crown ethers on this reaction. The data obtained substantiate the view that the topological correspondence concept is insufficient to explain the ability of crown ethers to form complexes with cat

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1993, 42 (6), 1052.pdf
Найти похожие

4.
Инвентарный номер: нет.
   
   I-85


   
    Isomerization of monohydroperfluoroalkenes [Electronic resource] / T. I. Filyakova, A. Ya. Zapevalov, M. I. Kodess, M. A. Kurykin, L. S. German // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1994. - Vol. 43, № 9. - P1526-1531
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Isomerization of monohydroperfluoro-1-alkenes HC(CF2)nCF=CF2 (n = 2 to 8) catalyzed by Lewis bases or acids (CsF, KHF2, and SbF5) under conditions of thermodynamic control affords equilibrium mixtures of all of the possible isomers resulting from migration of the double bond along the carbon chain. Under conditions of kinetic control, isomerization through the action of SbF5 gives -H-perfluoro-2-alkenes. The substantially higher proportion ofcis-isomers in the resulting monohydroperfluoroalkenes than in their perfluorinated analogs has been attributed to the effect of an intramolecular hydrogen bond

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1994, 43 (9), 1526.pdf
Найти похожие

5.
Инвентарный номер: нет.
   
   S 73


    Sosnovskikh, V. Ya.
    2,3-dihidro-2,2-dimethyl-6-trifluoromethyl-4-pyrone as Useful CF3-containing Synthon [Text] : доклад, тезисы доклада / V. Ya. Sosnovskikh, M. Yu. Mel'nikov, Yu. G. Yatluk // International Memorial I.Postovsky Conference on Organic Chemisty, Ekaterinburg, March 17-20, 1998 : program and abstracts. - Ekaterinburg, 1998. - P94
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ

Найти похожие

6.
Инвентарный номер: нет.
   
   S 73


    Sosnovskikh, V. Ya.
    Reaction of 3,3-dialkyl-6-trifluoromethyl-2,3-dihydro-4-pyrones with hydrazine hydrate [Electronic resource] / V. Ya. Sosnovskikh, M. Yu. Mel'nikov, M. I. Kodess // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 1998. - Vol. 47, № 7. - P1365-1368
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: 3,3-Dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrones react with hydrazine hydrate to give 2-hydrazino-2-trifluoromethyl-4-tetrahydropyrone hydrazones. When heated, the latter are transformed into 3(5)-(2-hydroxyethyl)-5(3)-trifluoromethylpyrazoles, while their treatment with HCl in ether leads to 3,3-dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrone azines

\\\\Expert2\\nbo\\Russian Chemical Bulletin\\1998, 47 (7), 1365.pdf
Найти похожие

7.
Инвентарный номер: нет.
   


   
    (E)-1,1,1-trifluoro-4-phenyl-but-2-ene-4-one and trimethyl phosphite [Text] / V. G. Ratner, E. Lork, K. I. Pashkevich, G. -V. Roeschenthaler // Journal of Fluorine Chemistry. - 2000. - Vol. 102, № 1-2. - P73-77
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The interaction of (E)-1,1,1-trifluoro-4-phenyl-but-2-ene-4-one (1) with trimethyl phosphite affords in a [4 + 1] cycloaddition the 1,2?5-oxaphospholene 2 as a sole product which upon hydrolysis is transformed into the fluoroalkyl containing ?-ketophosphonate 4. When the reaction is carried out in the presence of small mounts of water, in addition to 2 as a main product, the phosphoric acid ester 6 of the enolic dimer of ketone 1 is also formed. The molecular structure of compound 6 (monoclinic P 2(1)/c with a = 2088.60(2), b = 1403.1(3), c = 1613.8(1) pm, ? = 90, ? = 100.97(1), ? = 90°, Z = 8) was determined, indicating two independent molecules with (RR) and (SS) configuration and disordered CF3 groups.????

Найти похожие

8.
Инвентарный номер: нет.
   
   N 89


   
    Novel polyfluoroalkylated pyrazoles from 2-polyfluoroacylcycloalkanones and hydrazines: Syntheses and unequivocal molecular structure assignment [Text] / D. V. Sevenard, O. G. Khomutov, M. I. Kodess, K. I. Pashkevich, I. Loop, E. Lork, G. -V. Roeschenthaler // Canadian Journal of Chemistry. - 2001. - Vol. 79, № 2. - P183-194
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
HYDRAZINES -- MOLECULAR STRUCTURE -- ISOMERIC PYRAZOLES;
Аннотация: The reaction between 2-trifluoroacetylcycloalkanones and methylhydrazine or phenylhydrazine exclusively yields 3-CF3-pyrazoles. When the chain length of the polyfluorinated substituent in RFC(O) group increases, 5-RF-pyrazoles are isolated. The reaction of 2-trifluoroacetylcyclohexanone with 2-hydrazinopyradine gives 5-hydroxypyrazoline, an intermediate in the formation of 5-CF3-pyrazoles. The regiochemistry of the condensation is probably controlled by the nucleophilicity of the terminal nitrogen in the mono substituted hydrazines and by the steric requirements of the RF group in the 1,3-diketones. Polymethylene chain containing pyrazoles obtained from the 1,3-diketones in question and hydrazine prefer the 3-RF tautomeric form, irrespective of carbocyclic ring size and polyfluoroalkyl group chain length.

Найти похожие

9.
Инвентарный номер: нет.
   
   S 98


   
    Synthesis and the reactions of trifluoromethylated 1,2,3-triketones 2-(het)arylhydrazones and 4,7-dihydroazolo[5,1-c]triazines [Electronic resource] / O. G. Khudina, E. V. Shchegol'kov, Ya. V. Burgart, M. I. Kodess, O. N. Kazheva, A. N. Chekhlov, G. V. Shilov, O. A. Dyachenko, V. I. Saloutin, O. N. Chupakhin // Journal of Fluorine Chemistry. - 2005. - Vol. 126, № 8. - P1230-1238
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: The coupling of trifluoromethylated 1,3-diketones with (het)aryldiazonium chlorides results mainly in the formation of 1,2,3-triketones 2-(het)arylhydrazones while using hetarylamine with a NH-group at the ?-position of the heterocycle as the diazonium component gives 4,7-dihydroazolo[5,1-c]triazines due to cyclization at the trifluoroacetyl fragment. Trifluoromethylated 1,2,3-triketones 2-(het)arylhydrazones and 7-hydroxy-4,7-dihydroazolo[5,1-c]triazines react regio-selectively with methyl hydrazine and phenyl hydrazine to form 3-CF3-pyrazoles. The long-range coupling constants (JF-H) of 1-methylpyrazoles and the chemical shifts of trifluoromethyl groups in the 19F NMR spectra can be used for the determination of regio-isomeric structures of mono(trifluoromethyl)-substituted pyrazoles. 2-(Het)arylhydrazones and 4,7-dihydroazolo[5,1-c]triazines with two trifluoromethyl substituents afford the mixtures of cis- and trans-azopyrazoles in the reactions with hydrazines.

\\\\Expert2\\nbo\\Journal of Fluorine Chemistry\\2005, v.126, p.1230.pdf
Найти похожие

10.
Инвентарный номер: нет.
   
   П 53


   
    Получение полифторированных простых эфиров [] / Д. Н. Бажин, Т. И. Горбунова, А. Я. Запевалов, В. И. Салоутин // Журнал прикладной химии. - 2005. - Т. 78, N 10. - 1674-1678: табл. - Библиогр. : с. 1678 (10 назв.) . - ISSN 0044-4618
ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Исследованы методы синтеза простых полифторированных эфиров H(CF2CF2)n CH2OR на основе теломерных спиртов H(CF2CF2)nCH2OH (n=1-3) их алкилированием алкилгалогенидами и алкилтозилатами

Найти похожие

 1-10    11-20   21-27 
 

Сиглы отделов ЦНБ УрО РАН


  бр.ф. - Бронированный фонд

  бф - Научно-библиографический отдел

  БХЛ - Фонд художественной литературы

  ИИиА -Фонд исторической литературы в ЦНБ УрО РАН

  ИМЕТ -Отдел ЦНБ в Институте металлургии УрО РАН

  кх - Отдел фондов (книгохранениe)

  МБА - Межбиблиотечный абонемент

  мф - Методический фонд

  ок - Отдел научной каталогизации

  оку - Отдел комплектования и учета

  орф - Обменно-резервный фонд

  пф - Читальный зал деловой и патентной информации

  рк - Фонд редкой книги

  ч/з - Главный читальный зал

  эр - Зал электронных ресурсов

  

Сиглы библиотек институтов и НЦ УрО РАН
© Международная Ассоциация пользователей и разработчиков электронных библиотек и новых информационных технологий
(Ассоциация ЭБНИТ)
Яндекс.Метрика