1.1.1.2- Tetrafluoro-ethane

CPMP (Committee for Proprietary Medicinal Products). Result of the Coordinated Review of 1, 1, 1, 2-Tetrafluoro-ethane HFC-134a, 13 July 1994. 

Chloro-l,l,l,2- tetrafluoroethane 1,1,1,2-tetrafluoro-ethane (CF3CH2F) Metal catalysts/ carbon 100-250 °C 14... 

Gas-phase reactions were performed in a triple-quadrupole mass spectrometer, housing two reaction multipoles and two mass analyzers. The reaction of 5a with benzene in the gas phase gives rise to 6, a reactivity that was confirmed by reaction with isotopically labeled benzene. Subsequent activation through collision yields 7. When 6 was collided with either TFE or 1,1,1,2-tetrafluoroethane under identical conditions, no TFE- or 1,1,1,2-tetrafluoro-ethane-containing adducts or products could be detected, and the ratio of conversion of 6 to 7 in both cases was found to be identical within experimental error bounds. 1,1,1,2-tetrafluoroethane was used because it is similar to TFE in shape and polarity, but does not possess the same coordinative properties because it bears no oxygen atoms. 

Information is given on Freons 11, 12, 13, 21, 22. 113, 114 trichlorofluoro-, dichlorodifluoro-, chlorotrifluoro-, dichlorofluoro- and chlorodifluoro-methane 1,1, 2-trichloro-l,2,2-trifluoro-, and 1,2-dichloro-tetrafluoro-ethane, respectively. 

Using aluminum trifluoridc the disproportionation of 1.2-dichloro-l,1.2.2-tetrafluoro-ethane can be inhibited by the addition of hydrogen fluoride to the feed, which, however, increases the isomerization rate of 1.2-dichloro-l,l,2.2-tetrafluoroethane to 1,1-dichloro-... 

Phosponate Dimethyl 1.1.2.2-Tetrafluoro-ethane ElOb,. 677 (F4-ethene + H-POX2)... 

Phosphonigate Diethyl 2-(l,2-Dichloro-trifl uoro-ethoxy)-tetrafluoro-ethane E10b2, 153 (Educt)... 

So far, two alternative propellants, tetrafluoro-ethane (HFA-134a, CF3CH2F) and heptafluoropropane (HFA-227, CF3CHFCF3), have been successfully tested and developed as propellants in pMDIs. The physical properties of these two propellants are compared with those of CFCs in Table 9. 

Chemical Name Trichloro- fluoromethane Dichlorodi- fluoTomethane Dichlorofluoro- ethane Dichlorolri- fluoroethane Tetrafluoro- ethane... 

CHLOROETHENE HEXACHLORO-ETHANE 112TRICHLORO-TRIFLUOROETHANE 12DICHLORO-TETRAFLUORO-ETHANE CHLOROPENTA-FLUOROETHANE TETRAFLUORO-ETHENE HEXAFLUORO-ETHANE CYANOGEN TRICHLOROETHENE -9.886 PENTACHLORO- -143.234 ETHANE TRIFLUORO-ETHENE ACETYLENE (ETHYNE)... 

Dichlorotetralluoroethane EINECS 206-774-8 Ethane, 1,1-dichloro-1,2,2,2-tetrafluoro- Ethane, 1,1-dichlorotetrafluoro- Frigen 114A HSDB 5564 1,1,1,2-Tetralluoro-2,2-dichloroethane. Gas mp = -56.6 bp = 4 d 5 = 1.455 very soluble in CeHe. EtOH, Et20. 

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