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

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]

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 .^[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]

External links

• OKADA . Masaaki . 代替冷媒の表面張力 . Trans. of the JAR . 2 December 1995 . 12 . 2 . 135–145 . 10.11322/tjsrae.12.135 . Surface Tension of Alternative Refrigerants . ja.

Notes and References

1. Kubota . H. . Yamashita . T. . Tanaka . Y. . Makita . T. . Vapor pressures of new fluorocarbons . International Journal of Thermophysics . May 1989 . 10 . 3 . 629–637 . 10.1007/BF00507984. 1989IJT....10..629K . 122499503 .
2. Web site: Christian Balsiger . David Werner . Christof Holliger . Patrick Höhener . Reductive dechlorination of CFCs and HCFCs under methanogenic conditions . 15 July 2020 . 10 January 2005 . 15 July 2020 . https://web.archive.org/web/20200715184538/https://kobo.ch/balsiger/cv/publications/battelle/cfcs.pdf . dead .
3. Goodwin . A. R. H. . Moldover . M. R. . 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 . October 1991 . 95 . 7 . 5236–5242 . 10.1063/1.461831. 1991JChPh..95.5236G .