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

1,2-Dichloro-1,1,2-trifluoroethane.png 1,2-Dichloro-1,1,2-trifluoroethane R-123a 354-23-4 9254 206-549-4 3163 1078 9631 K8CR1MEG1D 1S/C2HCl2F3/c3-1(5)2(4,6)7/h1H YMRMDGSNYHCUCL-UHFFFAOYSA-N C(C(F)(F)Cl)(F)Cl 2 2 3 1 29.5 -78.0 1.50 1.327 620.01 mmHg 9.55×10−2 atm-cu m/mole 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.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 Formation 1,1,2-Trichloro-1,2,2-trifluoroethane can be biotransformed in sewage sludge to 1,2-dichloro-1,1,2-trifluoroethane.Christian Balsiger David Werner Christof Holliger Patrick Höhener Reductive dechlorination of CFCs and HCFCs under methanogenic conditions https://kobo.ch/balsiger/cv/publications/battelle/cfcs.pdf 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 It can be made from the reaction of tetrachloroethylene with hydrogen fluoride as a byproduct of HCFC-123 synthesis.Banks, R.E.; Smart, B.E.; Tatlow, J.C. (1994). "Alternatives to Chlorofluorocarbons (CFCs)". Organofluorine Chemistry: Principles and Commercial Applications. New York, ABD: Springer Science & Business Media. p. 166. doi:10.1007/978-1-4899-1202-2. Properties The critical temperature of R-123a is 461.6 K.Goodwin A. R. H. Michael Moldover 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 The rotation of the molecule appears to be hindered by the present of chlorine on each carbon atom, but is eased at higher temperatures. 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). References External links OKADA Masaaki 代替冷媒の表面張力 日本冷凍空調学会論文集 2 December 1995 12 2 135–145 10.11322/tjsrae.12.135 https://www.jstage.jst.go.jp/article/tjsrae/12/2/12_2_135/_article/-char/ja/ Surface Tension of Alternative Refrigerants ja Category:Hydrochlorofluorocarbons Category:Chlorofluoroalkanes Category:Haloethanes