334-99-6Relevant academic research and scientific papers
Shock-Wave Study of the High-Temperature UV Absorption and the Recombination of CF3 Radicals
Glaenzer, K.,Maier, M.,Troe, J.
, p. 1681 - 1686 (1980)
The high-temperature UV absorption and the recombination of CF3 radicals have been investigated in shock-wave experiments.CF3 radicals were produced near 1300 K in the fast dissociation of (CF3)2N2 and of CF3NO.At pressure of the bath gas Ar between 0.3 and 25 atm, the recombination was found to be in the unimolecular falloff range closer to the high than to the low pressure limit.Extrapolation to the high pressure limit gives krec,infinite(CF3)=(1.9+/-0.9)E13 cm3 mol-1 s-1 at T=1300 K.Earlier low-temperature results are compared with the present data by using unimolecular rate theory.
Fluorinated acetylenes. Part 8. Preparation and some reactions of 5,5,5-trifluoropent-3-yn-2-ol, 5,5,5-trifluoro-1-phenylpent-3-yn-2-ol and the derived ester, 2-acetoxy-5,5,5-trifluoropent-3-yne
Sibous, Lakhdar,Tipping, Anthony E.
, p. 39 - 49 (1993)
Treatment of the salt CF3CCLi (3) with the aldehydes RCH2CHO (R = H and Ph) affords the secondary alcohols CF3CCCHROH (1a) R = Me and (1b) R = CH2Ph.Alcohol 1a does not give the corresponding ketone on attempted oxidation (pyridinium chlorochromate or Na2Cr2O7/H2SO4), but alcohol 1b is oxidized to the diketone (CF3CCCOCHPh)2 (7) (41percent) by active MnO2.The acetate CF3CCCHMeO2CMe (2) undergoes facile reaction with diazomethane to give 3--1-methyl-4-trifluoromethylpyrazole (10a) and hence the 3- and 5--1-methyl-4-trifluoromethylpyrazoles (11a) and (12a), respectively.Cycloaddition also takes place between ester 2 and furan, but the major products (considered to be isomeric 1:1 adducts) have not been fully characterised.Although, ester 2 undergoes reaction with trifluoronitrosomethane, a cycloadduct has not been isolated, while nucleophilic attack by imidazole on the triple bond leads to the (Z)-alkene (18).
On the reaction of perfluoro-aza-propene with oxygen difluoride and fluorination of bis(trifluoromethyl)-hydroxylamine
Minkwitz, Rolf,Reinemann, Stefan,Ludwig, Ralf
, p. 145 - 149 (1999)
The reactions of perfluoro-aza-propene CF3NCF2 with an excess of oxygen difluoride OF2 and the fluorination of bis(trifluoromethyl)-hydroxylamine (CF3)2NOH are discussed. Additionally, we present density functional calculations (B3LYP/6-31G*) on bis(trifluoromethyl)-hypofluorite (CF3)2NOF, which clearly show that this molecule is a model substance for the discussion of negative hyperconjugation.
INTRACAVITY ABSORPTION OF He-nE-LASER RADIATION AS A DIRECT TIME-RESOLVED PROBE OF R + NO -> RNO REACTION KINETICS (R = C3F7, CF3, CH3)
Vakhtin, A. B.,Petrov, A. K.
, p. 603 - 606 (1990)
The reaction of NO with C3F7, CF3 and CH3 have been studied at room temperature using laser flash photolysis coupled with time-resolved product absorption.The pressure dependent rate coefficients were extrapolated using the Troe procedure to provide estimates of k0 and kinfinite.
Perfluoroalkylation of simple inorganic molecules: A one step route to novel perfluoroalkylated compounds
Singh, Rajendra P.,Shreeve, Jean'ne M.
, p. 1818 - 1819 (2002)
Reactions of (CH3)3SiRf (Rf = CF3, C2F5) with NOCl, NO/NO2, SO2, CO2, in the presence of caesium fluoride provide a one step synthetic route to perfluoroalkylated compounds in very good yields.
Neue Syntheseverfahren fuer Nitrosoperfluoralkane CnF(2n+1)NO (n = 1, 2, 3, 6)
Ludovici, K.,Naumann, D.,Siegemund, G.,Tyrra, W.,Varbelow, H.-G.,Wrubel, H.
, p. 273 - 274 (1995)
Perfluoronitrosomethane, CF3NO, may be isolated in ca. 50percent yield of a reaction mixture of i-C3H7ONO2 with ZnBr(CF3)*2CH3CN in the presence of aluminium trichloride.Approximately quantitative yields of CnF(2n+1)NO (n = 1, 2, 3, 6) may be obtained by reacting NOCl with Cd(CnF(2n+1))2*glyme.The preparations are described. - Keywords: Perfluoronitrosoalkanes; Syntheses; F-Alkylcadmium complexes
DIE REAKTION VON (CF3)2Cd*D MIT (CH3)Sn(ONO2): EIN NEUES DARSTELLUNGSVERFAHREN FUER CF3NO
Lange, Horst,Naumann, Dieter
, p. 93 - 96 (1984)
CF3NO is formed from the reaction of (CH3)3Sn(ONO2) with (CF32Cd*diglyme at room temperature as the only volatile product in 60 percent yield.
The reaction of perfluoro-2,5-diazahexane 2,5-dioxyl with aromatic compounds and perfluoroiodoalkanes
Green, Michael J.,Tipping, Anthony E.
, p. 237 - 242 (1994)
Treatment of perfluoro-2,5-diazahexane 2,5-dioxyl (1) with the fluoroarenes C6F5X (X = F or Br at c. 20 deg C; X = CF3 at 50 deg C) and pentafluoropyridine (50 deg C) gives 2:1 copolymers in high yield, but pentachloropyridine is unreactive at 50 deg C.Copolymers are also formed between 1 and the arenes C6F5I, C6F5H and C6H6 which did not analyse correctly for 2:1 copolymers; in the latter case, hydrogen abstraction is taking place as shown by the presence of N-OH and C=O groups in the polymer.Hexafluorobenzene is not incorporated in the polymer formed by treatment of 1 with a mixture of vinylidene fluoride and hexafluorobenzene.Photochemical reaction of trifluoroiodomethane with 1 affords the bishydroxylamine CF3ON(CF3)CF2CF2N(CF3)OCF3 in quantitative yield, while the di-iodides I(CF2)nI (n = 2 and 4) give copolymers of 1 and the units (CF2)n (n = 2 and 4), which contain (CF2)nI end-groups.
Photochemistry of matrix isolated (Trifluoromethyl)sulfonyl azide, CF3SO2N3
Zeng, Xiaoqing,Beckers, Helmut,Willner, Helge,Neuhaus, Patrik,Grote, Dirk,Sander, Wolfram
, p. 2281 - 2288 (2015/03/30)
The photochemistry of matrix isolated (trifluoromethylsulfonyl) azide, CF3SO2N3, has been studied at low temperatures. Upon ArF laser irradiation (λ = 193 nm), the azide eliminates N2 and furnishes triplet [(trifluoromethyl)sulfonyl]nitrene, CF3SO2N, which has been characterized by IR and EPR spectroscopy. Upon subsequent UV light irradiation (λ = 260-400 nm) the nitrene converts to CF3N=SO2 and CF3S(O)NO through a Curtius-type rearrangement. Further two new species CF2N=SO2F and FSNO were identified together with CF2NF, SO2, F2CO, CF3NO, and SO as side products. In addition, triplet nitrene CF3N was detected by its EPR and IR spectra. The complex stepwise photodecomposition of matrix isolated CF3SO2N3 is discussed in terms of the observed photolysis products and quantum chemical calculations.
Reactivity of Negative Ions with Trifluoromethyl Halides
Morris, Robert A.,Viggiano, A. A.,Miller, Thomas M.,Seeley, John V.,Arnold, Susan T.,et al.
, p. 10641 - 10645 (2007/10/03)
The kinetics of the reactions of selected anions (A(-)) with the trifluoromethyl halides CF3X (X = F, Cl, Br, I) in the gas phase were measured at 300 K.Reaction rate constants and product branching fractions were determined using a selected ion flow tube (SIFT) instrument.The chosen anions were C5F5N(-), o-, m-, and p-CF3C6H4CN(-), C6F5Br(-), C6F5Cl(-), C6F5CF3(-), C6F5COCH3(-), Fe(-), FeCO(-), SF6(-), SO(-), SO2(-), NO(-), NO2(-), and NO3(-).The reactivity of these systems varies from unreactive to collisional, and a variety of reaction types was found.The results of our present and previous measurements on A(-) + CF3X reactions show that, in cases where nondissociative electron transfer (NDET) is energetically allowed, the total reactivity tends to be high, approaching collisional.This suggests that reactivity in these cases is initiated and controlled by electron transfer from the anion.In addition, association reactions tend to be preempted when NDET is energetically allowed.A few exceptions to these tendencies were found and are discussed.
