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

1,2-Dichloro-1,1,2-trifluoroethane
Names
	Preferred IUPAC name 1,2-Dichloro-1,1,2-trifluoroethane
	Other names R-123a
Identifiers
CAS Number	354-23-4;
3D model (JSmol)	Interactive image;
ChemSpider	9254;
ECHA InfoCard	100.005.955
EC Number	206-549-4;
PubChem CID	9631;
UNII	K8CR1MEG1D;
UN number	3163 1078
CompTox Dashboard (EPA)	DTXSID1042021 ;
	InChI InChI=1S/C2HCl2F3/c3-1(5)2(4,6)7/h1H Key: YMRMDGSNYHCUCL-UHFFFAOYSA-N;
	SMILES C(C(F)(F)Cl)(F)Cl;
Properties
Chemical formula	C2HCl2F3
Molar mass	152.93 g·mol−1
Density	1.50
Melting point	−78.0 °C (−108.4 °F; 195.2 K)
Boiling point	29.5 °C (85.1 °F; 302.6 K)
Vapor pressure	620.01 mmHg
Henry's law; constant (kH)	9.55×10−2 atm-cu m/mole
Refractive index (nD)	1.327
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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 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

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.
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.
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.

External links

OKADA, Masaaki (2 December 1995). "代替冷媒の表面張力" [Surface Tension of Alternative Refrigerants]. Trans. Of the JAR (in Japanese). 12 (2): 135–145. doi:10.11322/tjsrae.12.135.

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[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] 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.

[good-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.