1,2-Dichloro-1,1,2-trifluoroethane

1,2-Dichloro-1,1,2-trifluoroethane

1,2-Dichloro-1,1,2-trifluoroethane

Chemical compound

1,2-Dichloro-1,1,2-trifluoroethane is a volatile liquid chlorofluoroalkane composed of carbon, hydrogen, chlorine and fluorine, and with structural formula CClF2CHClF. It is also known as a refrigerant with the designation R-123a.[1]

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Formation

1,1,2-Trichloro-1,2,2-trifluoroethane can be biotransformed in sewage sludge to 1,2-dichloro-1,1,2-trifluoroethane.[2]

Properties

The critical temperature of R-123a is 461.6 K (188.5 °C; 371.2 °F).[3] The rotation of the molecule appears to be hindered by the present of chlorine on each carbon atom, but is eased at higher temperatures.[3]

Use

Although not deliberately used, R-123a is a significant impurity in its isomer, the widely used 2,2-dichloro-1,1,1-trifluoroethane (R-123).[3]

References

  1. [1]
    Kubota, H.; Yamashita, T.; Tanaka, Y.; Makita, T. (May 1989). "Vapor pressures of new fluorocarbons". International Journal of Thermophysics. 10 (3): 629–637. Bibcode:1989IJT....10..629K. doi:10.1007/BF00507984. S2CID 122499503.
  2. [2]
    Christian Balsiger; David Werner; Christof Holliger; Patrick Höhener (10 January 2005). "Reductive dechlorination of CFCs and HCFCs under methanogenic conditions" (PDF). Archived from the original (PDF) on 15 July 2020. Retrieved 15 July 2020.
  3. [3]
    Goodwin, A. R. H.; Moldover, M. R. (October 1991). "Thermophysical properties of gaseous refrigerants from speed-of-sound measurements. III. Results for 1,1-dichloro-2,2,2-trifluoroethane (CHCl2-CF3) and 1,2-dichloro-1,2,2-trifluoroethane (CHClF-CClF2)". The Journal of Chemical Physics. 95 (7): 5236–5242. Bibcode:1991JChPh..95.5236G. doi:10.1063/1.461831.
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