Names | |
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Other names
trans-1,2-Dichloroethylene
1,2-DCE sym-Dichloroethylene | |
Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
PubChem CID
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Properties | |
C2H2Cl2 | |
Molar mass | 96.95 g/mol |
Appearance | colorless liquid[1] |
Odor | sweet[2] |
Density | 1.26 g/cm3 |
Melting point | −49.44 °C |
Boiling point | 48.5 °C |
| |
0 D | |
Hazards | |
Flash point | 2–4 °C; 36–39 °F; 275–277 K |
Explosive limits | 5.6–12.8%[1] |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
|
770 mg/kg (oral, rat) 1275 mg/kg (oral, rat)[3] |
LC50 (median concentration)
|
21,273 ppm (mouse, 6 hr)[3] |
NIOSH (US health exposure limits): | |
PEL (Permissible)
|
TWA 200 ppm (790 mg/m3)[1] |
REL (Recommended)
|
TWA 200 ppm (790 mg/m3)[1] |
IDLH (Immediate danger)
|
1000 ppm[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
trans-1,2-Dichloroethene is an organochloride with the molecular formula C2H2Cl2. It is a geometric isomer of cis-1,2-dichloroethene. The two are often used as a mixture. Both have modest solubility in water, are colorless liquids, and have sweet odors. The trans compound is mainly used as a specialized degreaser.[2] In contrast to most cis-trans compounds, the Z isomer (cis) is more stable than the E isomer (trans) by 0.4 kcal/mol.[4]
Production and reactions
editIndustrially both isomers of 1,2-dichloroethene arise as byproducts of the production of vinyl chloride, which is produced on a vast scale. Unlike vinyl chloride, neither isomer of 1,2-dichloroethene polymerizes.[2]
trans-DCE is used for cleaning of electronics and other speciallized cleaning applications.[5]
trans-1,2-Dichloroethene participates in cycloaddition reactions.[6]
Safety
editThe isomers of 1,2-dichloroethene compounds have "moderate oral toxicity to rats".[2]
See also
edit- 1,1-Dichloroethene
- 1,2-Dichloroethane, which is also often abbreviated as 1,2-DCA
References
edit- ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0195". National Institute for Occupational Safety and Health (NIOSH).
- ^ a b c d E.-L. Dreher; T. R. Torkelson; K. K. Beutel (2011). "Chlorethanes and Chloroethylenes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.o06_o01. ISBN 978-3527306732.
- ^ a b "1,2-Dichloroethylene". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ Pitzer, Kenneth S.; Hollenberg, J. L. (1954). "cis- and trans-Dichloroethylenes. The Infrared Spectra from 130–400 Cm.–1 and the Thermodynamic Properties". J. Am. Chem. Soc. 76 (6): 1493–1496. doi:10.1021/ja01635a010.
- ^ "Chlorinated Solvents and Feed Stock - Axiall". Archived from the original on 2016-04-08. Retrieved 2016-03-23.
- ^ Wang, Xiao Min; Hou, Xuelong; Zhou, Zhongyuan; Mak, Thomas C. W.; Wong, Henry N. C. (1993). "Arene synthesis by extrusion reaction. 16. Coplanar and stable derivatives of 13,14-didehydro-tribenzo[a,c,e]cyclooctene: Synthesis of 5,6-didehydro-1,1,14,14-tetramethyl-10,11-methano-1H-benzo[5,6]cycloocta[1,2,3,4-def]fluorene and 5,6-didehydro-10,11-methano-1H-benzo[5,6]cycloocta[1,2,3,4-def]fluorene-1,14-dione and x-ray crystal structures of 1,1,14,14-tetramethyl-10,11-methano-1H-benzo[5,6-cycloocta[1,2,3,4-def]fluorene and 1,12-dihydro-1,1,12,12-tetramethyldicyclopenta[def,JKL]tetraphenylene". The Journal of Organic Chemistry. 58 (26): 7498–7506. doi:10.1021/jo00078a031.
External links
edit- International Chemical Safety Card 0436
- NIOSH Pocket Guide to Chemical Hazards. "#0195". National Institute for Occupational Safety and Health (NIOSH).
Category:Chloroalkenes
Category:Halogenated solvents
Names | |
---|---|
Other names
cis-1,2-Dichloroethene
| |
Identifiers | |
3D model (JSmol)
|
|
ChEBI | |
ChemSpider | |
KEGG | |
PubChem CID
|
|
| |
| |
Properties | |
C2H2Cl2 | |
Molar mass | 96.95 g/mol |
Appearance | colorless liquid |
Odor | sweet[1] |
Density | 1.28 g/cm3 |
Melting point | −81.47 °C |
Boiling point | 60.2 °C |
| |
1.9 D | |
Hazards | |
Flash point | 2–4 °C; 36–39 °F; 275–277 K |
Explosive limits | 5.6–12.8%[2] |
Lethal dose or concentration (LD, LC): | |
LCLo (lowest published)
|
16,000 ppm (rat, 6 hr, cis-isomer)ref name=Ullmann/> |
NIOSH (US health exposure limits): | |
PEL (Permissible)
|
TWA 200 ppm (790 mg/m3)[2] |
REL (Recommended)
|
TWA 200 ppm (790 mg/m3)[2] |
IDLH (Immediate danger)
|
1000 ppm[2] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
cis-1,2-Dichloroethene is an organochloride with the molecular formula C2H2Cl2. It is a geometric isomer of trans-1,2-dichloroethene. The two are often used as a mixture. Both have low solubility in water, are colorless liquids, and have sweet odors. The trans compound finds some applications as a specialized degreaser,[1] whereas the cis compound is a specialized reagent in organic synthesis.
Production
editIndustrially both isomers of 1,2-dichloroethene arise as byproducts of the production of vinyl chloride, which is produced on a vast scale. Unlike vinyl chloride, neither isomer of 1,2-dichloroethene polymerizes.[1]
E-Z relative stability
editIn contrast to most cis-trans compounds, the Z isomer (cis) is more stable than the E isomer (trans) by 0.4 kcal/mol.[3]
Safety
editThe isomers of 1,2-dichloroethene compounds have "moderate oral toxicity to rats".[1]
See also
edit- 1,1-Dichloroethene
- 1,2-Dichloroethane, which is also often abbreviated as 1,2-DCA
References
edit- ^ a b c d E.-L. Dreher; T. R. Torkelson; K. K. Beutel (2011). "Chlorethanes and Chloroethylenes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.o06_o01. ISBN 978-3527306732.
- ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0195". National Institute for Occupational Safety and Health (NIOSH).
- ^ Pitzer, Kenneth S.; Hollenberg, J. L. (1954). "cis- and trans-Dichloroethylenes. The Infrared Spectra from 130–400 Cm.–1 and the Thermodynamic Properties". J. Am. Chem. Soc. 76 (6): 1493–1496. doi:10.1021/ja01635a010.
External links
edit- International Chemical Safety Card 0436
- NIOSH Pocket Guide to Chemical Hazards. "#0195". National Institute for Occupational Safety and Health (NIOSH).