1986
DOI: 10.1002/chin.198639174
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ChemInform Abstract: High Energy Conversion Processes of Polyfluoroalkanes. Part 4. Thermal Conversion of Chlorotrifluoroethylene.

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Cited by 2 publications
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“…The three major resonances with partially resolved spin−spin coupling for the three vinylic fluorines agree well with published data in solution. In this case, rather exceptionally, the NMR spectrum was also studied in the gas phase to provide information on the 19 F nuclear magnetic shielding for the three different vinylic environments in CTFE. , Already quite visible are the narrower lines belonging to a 1:1 mixture of cis - and trans -1,2-dichlorohexafluorocyclobutane whose solution spectra have also been studied before. 11a, These lines grow at the expense of the CTFE resonances, as can be seen graphically by viewing the set of spectra obtained automatically according to a prearranged time schedule. A spectrum near the end of the reaction is shown in Figure (bottom).…”
Section: Resultsmentioning
confidence: 98%
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“…The three major resonances with partially resolved spin−spin coupling for the three vinylic fluorines agree well with published data in solution. In this case, rather exceptionally, the NMR spectrum was also studied in the gas phase to provide information on the 19 F nuclear magnetic shielding for the three different vinylic environments in CTFE. , Already quite visible are the narrower lines belonging to a 1:1 mixture of cis - and trans -1,2-dichlorohexafluorocyclobutane whose solution spectra have also been studied before. 11a, These lines grow at the expense of the CTFE resonances, as can be seen graphically by viewing the set of spectra obtained automatically according to a prearranged time schedule. A spectrum near the end of the reaction is shown in Figure (bottom).…”
Section: Resultsmentioning
confidence: 98%
“…To carry out the validation of this kinetic technique, it was decided to reexamine the kinetics of two prototypical cyclodimerization reactions involving fluoroolefins, those of chlorotrifluoroethylene and tetrafluoroethylene, whose rates and kinetic activation parameters have been determined quite accurately. The kinetics of the thermal cyclodimerization of chlorotrifluoroethylene (CTFE) , and tetrafluoroethylene (TFE) 10,11b,12 have been studied by several investigators by measuring the pressure changes during the course of the reaction in heated vessels of 250 mL to 1 L volume. At pressures of 1 atm or less, these cyclodimerizations (eq 1) are well-behaved homogeneous second-order reactions, with rates that are independent of pressure and unaffected by heterogeneous wall reactions.…”
Section: Introductionmentioning
confidence: 99%
“…Yet another method for the synthesis of the diene 82 is based on dechlorination of 1,3,4,4-tetrachloro-1,2,3,4-tetrafluorobut-1ene (87), which is the product of thermal dimerisation of the ethylene 85. 63,64 The diene 82 is formed in preparative yield upon treatment of 1,2-dibromo-1,3,4,4-tetrachloro-1,2,3,4-tetrafluorobutane (88), which is the product of bromine addition to the butene 87, 64 with zinc in dioxane (Scheme 1).…”
Section: E Hexahalogenobutadienesmentioning
confidence: 99%
“…61 The diene 81 adds two molecules of bromine at 50 8C and gives 1,2,3,4-tetrabromo-3-chloro-1,1,2,4,4-pentafluorobutane, the structure of which was confirmed by the results of chromatomass spectrometry. 87 According to Petrov et al, 95 the chlorination and bromination of the diene 81 occur exclusively as the 1,4addition and lead to the corresponding but-2-enes. Thus treatment of the diene 81 with a mixture of N-bromosuccinimide (NBS) and HF in THF yielded a mixture of E-and Z-isomers of 3-chloro-1-bromo-1,1,2,4,4,4-hexafluorobut-2-ene (E : Z = 5 : 1) in a total yield of 82 %.…”
Section: Chemical Properties Of Mixed Halogenobuta-13-dienes 1 Additi...mentioning
confidence: 99%
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