Dichlorodifluoroethylene

Dichlorodifluoroethylene

1,1-Dichloro-2,2-difluoroethylene
cis-1,2-Dichloro-1,2-difluoroethylene trans-1,2-Dichloro-1,2-difluoroethylene
Names
IUPAC names 1,1-Dichloro-2,2-difluoroethene (Z)-1,2-Dichloro-1,2-difluoroethene (E)-1,2-Dichloro-1,2-difluoroethene
Identifiers
CAS Number	79-35-6 Y 311-81-9 N 381-71-5 N
3D model (JSmol)	Interactive image Interactive image Interactive image
ChemSpider	21106435 Y 2018468 N 2297331 N
ECHA InfoCard	100.001.090
PubChem CID	6592 2736814 3032334
InChI InChI=1S/C2Cl2F2/c3-1(4)2(5)6 Y Key: QDGONURINHVBEW-UHFFFAOYSA-N Y InChI=1S/C2Cl2F2/c3-1(5)2(4)6/b2-1- Key: UPVJEODAZWTJKZ-UPHRSURJSA-N InChI=1S/C2Cl2F2/c3-1(5)2(4)6/b2-1+ Key: UPVJEODAZWTJKZ-OWOJBTEDSA-N
SMILES ClC(Cl)=C(F)F Cl/C(F)=C(\Cl)F Cl/C(F)=C(/Cl)F
Properties
Chemical formula	C2Cl2F2
Molar mass	132.92 g·mol−1
Magnetic susceptibility (χ)	-60.0·10−6 cm3/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

A dichlorodifluoroethylene (systematically named dichlorodifluoroethene) is one of three compounds with the chemical formula C
2Cl
2F
2. Dichlorodifluoroethylenes are colourless gases, and are some of the simplest chlorodifluoroalkenes.

The structural isomers are used as intermediates or precursors in the production of other industrial chemicals.

1,1-Dichloro-2,2-difluoroethylene is a low-boiling liquid that is used a refrigerant. It may also be used as a solvent, but has practical limitations as such, because of its low boiling point (commercial listings, 19 °C; lit. 17 °C).

It is regarded as a hazardous chemical for being toxic by inhalation (see MSDS), and a low-boiling liquid, and it causes irritation when it comes into contact with the skin and mucous membranes. Its ASHRAE number is R-1112a, and its CAS number is 79-35-6. Concentrated 1,1-dichloro-2,2-difluoroethylene can be ignited with ease in the laboratory.

The diastereomers were co-isolated first in 1965, by using a combination of fractional melting and fractional distillation. The cis isomer's ASHRAE number is R-1112c, and its CAS number is 311-81-9. Its melting point is −119.6 °C (−183.3 °F). The trans isomer's ASHRAE number is R-1112t, and its CAS number is 381-71-5. Its melting point is −93.3 °C (−135.9 °F). The diastereomers are commercially only available as a mixtures of varying proportions.