| 134469-97-9

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 有机氟化物
• CAS: 134469-97-9
• 化学式: C₂HF₄O₂
• 分子量: 133.022
• InChiKey: KSKWNOBRQPSEFG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  10.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  在 氧化亚氮 作用下， 24.85 ℃ 、10.67 Pa 条件下， 生成 Ethoxy, 1,2,2,2-tetrafluoro-
  参考文献：
  名称：

  C2H6 和一些 C2 氢氟烃的大气氧化的时间分辨实验

  摘要：

  我们报告了与 C2H6、CF3CF2H (HFC-125)、CF3CH3 (HFC-143a) 和 CF3CFH2 (HFC-134a) 的大气氧化相关的新时间分辨测量值。自由基 R = C2H5、CF3CF2、CF3CH2 和 CF3CFH 是在大量过量的 O2 和不同浓度的 NO 存在下，使用脉冲准分子激光器的输出，在 248 nm 光解相应的碘化物 RI 产生的展示。NO 的损失和反应产物 CH3C(O)H（来自 C2H5 自由基）、C(O)F2 和 FNO（来自 CF3CF2）以及 C(O)F2 和 HFCO（来自 CF3CFH）的形成，通过吸收可调谐二极管激光器提供的红外辐射实时进行。我们的测量基本上证实了先前的结论，主要基于连续的光解实验，关于这些化合物的氧化机制，以及它们如何根据 RO（乙氧基或取代的乙氧基自由基）是由两个烷基过氧自由基 (RO2 + RO2) 的相互反应或这些自由基中的一个与

  DOI：

  10.1039/b305396m
• 作为产物：
  描述：

  1,2,2,2-tetrafluoro-ethyl 在 氧气 、 六氟化硫 作用下， 以 gas 为溶剂， 生成
  参考文献：
  名称：

  Atmospheric chemistry of HFC-134a: Kinetics of the decomposition of the alkoxy radical CF3CFHO

  摘要：

  Decomposition of the CF3CFHO radical formed in the reaction of CF3CFHO2 radicals with NO was studied at 296 and 393 K using a pulse radiolysis transient VIS-UV absorption absolute rate technique. At room temperature in 1 atmosphere of SF6 diluent it was found that the majority (79 +/- 20)% of CF3CFHO radicals formed in the CF3CFHO2 + NO reaction decompose within 3 mu s via C-C bond scission. This result is discussed with respect to the current understanding of the atmospheric degradation of HFC-134a. As a part of the present work the rate constant ratio k(CF3CFH+02)/k(CF3CFH+NO) was determined to be 0.144 +/- 0.029 in one atmosphere of SF6 diluent at 296 K. (C) 1997 John Wiley & Sons, Inc.

  DOI：

  10.1002/(sici)1097-4601(1997)29:3<209::aid-kin8>3.0.co;2-y

文献信息

• Flash photolysis-time-resolved UV spectroscopy of the 1,2,2,2-tetrafluoroethylperoxy radical self-reaction
  作者：M. Matti Maricq、Joseph J. Szente

  DOI：10.1021/j100205a048

  日期：1992.12

  The self-reaction of CF3CFHO2 has been studied via time-resolved ultraviolet spectroscopy over the temperature range 211-372 K. The absorption spectrum of CF3CFHO2 extends from 190 to 275 nm with a maximum cross section of (5.2 +/- 0.3) x 10(-18) cm2 molecule-1 at 213 nm. The UV absorbance of the reaction mixture decreases and shifts to the blue as the reaction progresses. This is consistent with the CF3CFHO2 self-reaction producing CF3CFHO, the alkoxy radical then decomposing to yield CF3, which adds molecular oxygen to form CF3O2. The CF3CFHO2 self-reaction has a negative temperature dependence with rate constant given by k1 = (7.8 +/- 1.3) X 10(-13)e(605+/-40)/T cm3 s-1. The rate of alkoxy radical dissociation, at 230 Torr of total pressure, is k2a = (3.7 +/- 0.7) X 10(7)e-(2200+/-150)/T s-1 . The rate constants for CF3O2 reaction with CF3CFHO2 and itself are determined to be k8 = (8 +/- 3) x 10(-12) and k9 = (1.8 +/- 0.5) x 10(-12) cm3 s-1, respectively, at 297 K.
• Time-resolved experiments on the atmospheric oxidation of C2H6 and some C2 hydrofluorocarbons
  作者：Rouslan V. Olkhov、Ian W. M. Smith

  DOI：10.1039/b305396m

  日期：——

  (HFC-143a) and CF3CFH2 (HFC-134a). The radicals R = C2H5, CF3CF2, CF3CH2 and CF3CFH were produced by photolysis of the corresponding iodides, RI, at 248 nm, using the output from a pulsed excimer laser, in the presence of a large excess of O2 and with different concentrations of NO present. The loss of NO and the formation of the reaction products, CH3C(O)H (from C2H5 radicals), C(O)F2 and FNO (from CF3CF2)

  我们报告了与 C2H6、CF3CF2H (HFC-125)、CF3CH3 (HFC-143a) 和 CF3CFH2 (HFC-134a) 的大气氧化相关的新时间分辨测量值。自由基 R = C2H5、CF3CF2、CF3CH2 和 CF3CFH 是在大量过量的 O2 和不同浓度的 NO 存在下，使用脉冲准分子激光器的输出，在 248 nm 光解相应的碘化物 RI 产生的展示。NO 的损失和反应产物 CH3C(O)H（来自 C2H5 自由基）、C(O)F2 和 FNO（来自 CF3CF2）以及 C(O)F2 和 HFCO（来自 CF3CFH）的形成，通过吸收可调谐二极管激光器提供的红外辐射实时进行。我们的测量基本上证实了先前的结论，主要基于连续的光解实验，关于这些化合物的氧化机制，以及它们如何根据 RO（乙氧基或取代的乙氧基自由基）是由两个烷基过氧自由基 (RO2 + RO2) 的相互反应或这些自由基中的一个与
• Atmospheric chemistry of HFC-134a: Kinetics of the decomposition of the alkoxy radical CF3CFHO
  作者：Trine E. M�gelberg、Jens Sehested、Timothy J. Wallington、Ole J. Nielsen

  DOI：10.1002/(sici)1097-4601(1997)29:3<209::aid-kin8>3.0.co;2-y

  日期：——

  Decomposition of the CF3CFHO radical formed in the reaction of CF3CFHO2 radicals with NO was studied at 296 and 393 K using a pulse radiolysis transient VIS-UV absorption absolute rate technique. At room temperature in 1 atmosphere of SF6 diluent it was found that the majority (79 +/- 20)% of CF3CFHO radicals formed in the CF3CFHO2 + NO reaction decompose within 3 mu s via C-C bond scission. This result is discussed with respect to the current understanding of the atmospheric degradation of HFC-134a. As a part of the present work the rate constant ratio k(CF3CFH+02)/k(CF3CFH+NO) was determined to be 0.144 +/- 0.029 in one atmosphere of SF6 diluent at 296 K. (C) 1997 John Wiley & Sons, Inc.