1,2-difluoroethane

Structural formula
General
Surname	1,2-difluoroethane
other names	HFC-152
Molecular formula	C 2 H 4 F 2
External identifiers / databases
EC number	824-248-1
ECHA InfoCard	100.259.147
PubChem	12223
Wikidata	Q27254799
properties
Molar mass	66.05 g mol −1
Physical state	liquid
density	0.913 g cm −3 (19 ° C)
Melting point	−104 ° C
boiling point	26 ° C
solubility	easily soluble in benzene and chloroform
Refractive index	1.28 (25 ° C)
safety instructions
H and P phrases	H: 224-301 + 311-315-319-330-335
	P: 210-233-240-241-242-243-260-264-270-271-280-284-301 + 310-302 + 352-303 + 361 + 353-304 + 340-305 + 351 + 338-310-320-321
Global warming potential	20 (based on 100 years)
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

1,2-Difluoroethane is a chemical compound from the group of fluorocarbons .

Extraction and presentation

1,2-Difluoroethane can be obtained by reacting ethene with fluorine . Another method of preparation is the addition of fluorine to ethene using xenon difluoride , although a product mixture of 45% 1,2-difluoroethane, 35% 1,1-difluoroethane and 1,1,2-trifluoroethane is formed.

properties

1,2-Difluoroethane is a liquid that is readily soluble in benzene and chloroform . It is mainly in the cis form. In a solid form near its melting point, the compound has a monoclinic crystal structure with the space group C 2 / m (space group no.12) , while a second form with an orthorhombic crystal structure with the space group space group P 2 ₁ 2 ₁ 2 ₁ (space group no . 19) exists. Template: room group / 12 Template: room group / 19

use

1,2-Difluoroethane was used as the refrigerant .

Individual evidence

↑ ^a ^b ^c ^d William M. Haynes: CRC Handbook of Chemistry and Physics, 94th Edition . CRC Press, 2016, ISBN 978-1-4665-7115-0 , pp. 67 ( limited preview in Google Book search).
↑ ^a ^b Entry on 1,2-difluoroethane in the Hazardous Substances Data Bank , accessed on March 4, 2018.
↑ ^a ^b Floris Akkerman, Jürgen Buschmann, Dieter Lentz, Peter Luger, Eva Rödel: Crystal and molecular structure of 1,2-difluoroethane and 1,2-diiodoethane. In: Journal of Chemical Crystallography . 33, pp. 969-975, doi : 10.1023 / A: 1027494101785 .
↑ ^a ^b synquestlabs: 1,2-Difluoroethane , accessed on November 5, 2019
↑ G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).
↑ RH Hauge, S. Gransden, JLF Wang, JL Margrave: Studies of the reactions of molecular fluorine with methane, acetylene, ethylene, allene, and other small hydrocarbons in matrices at low temperatures. In: Journal of the American Chemical Society . 101, 1979, pp. 6950-6954, doi : 10.1021 / ja00517a027 .
↑ e-EROS Encyclopedia of Reagents for Organic Synthesis , 1999–2013, John Wiley and Sons, Inc., entry for Xenon (II) fluoride, accessed January 20, 2018 .
↑ Yang, N.-C .; Shieh, T.-C .; Feit, ED; Chernick, CL: Reactions of xenon fluorides with organic compounds ; in: J. Org. Chem. 35, 1970, pp. 4020-4024, doi : 10.1021 / jo00837a001 .
↑ Peer Kirsch: Modern Fluoroorganic Chemistry Synthesis, Reactivity, Applications . John Wiley & Sons, 2006, ISBN 978-3-527-60419-7 , pp. 243 ( limited preview in Google Book search).
↑ Alexander V. Benderskii, Charles A. Wight: Conformational Isomerization of 1,2-Difluoroethane in Solid Argon: Cage-Modified Reaction Barriers. In: The Journal of Physical Chemistry . 100, 1996, pp. 14958-14961, doi : 10.1021 / jp961519d .

[William_M._Haynes-1] William M. Haynes: CRC Handbook of Chemistry and Physics, 94th Edition . CRC Press, 2016, ISBN 978-1-4665-7115-0 , pp. 67 ( limited preview in Google Book search).

[HSDB-2] Entry on 1,2-difluoroethane in the Hazardous Substances Data Bank , accessed on March 4, 2018.

[DOI10.1023/A:1027494101785-3] Floris Akkerman, Jürgen Buschmann, Dieter Lentz, Peter Luger, Eva Rödel: Crystal and molecular structure of 1,2-difluoroethane and 1,2-diiodoethane. In: Journal of Chemical Crystallography . 33, pp. 969-975, doi : 10.1023 / A: 1027494101785 .

[synquestlabs-4] synquestlabs: 1,2-Difluoroethane , accessed on November 5, 2019

[5] G. Myhre, D. Shindell et al .: Climate Change 2013: The Physical Science Basis . Working Group I contribution to the IPCC Fifth Assessment Report. Ed .: Intergovernmental Panel on Climate Change . 2013, Chapter 8: Anthropogenic and Natural Radiative Forcing, pp. 24-39; Table 8.SM.16 ( PDF ).

[DOI10.1021/ja00517a027-6] RH Hauge, S. Gransden, JLF Wang, JL Margrave: Studies of the reactions of molecular fluorine with methane, acetylene, ethylene, allene, and other small hydrocarbons in matrices at low temperatures. In: Journal of the American Chemical Society . 101, 1979, pp. 6950-6954, doi : 10.1021 / ja00517a027 .

[7] -EROS Encyclopedia of Reagents for Organic Synthesis , 1999–2013, John Wiley and Sons, Inc., entry for Xenon (II) fluoride, accessed January 20, 2018 .

[Yang-8] Yang, N.-C .; Shieh, T.-C .; Feit, ED; Chernick, CL: Reactions of xenon fluorides with organic compounds ; in: J. Org. Chem. 35, 1970, pp. 4020-4024, doi : 10.1021 / jo00837a001 .

[Peer_Kirsch-9] Peer Kirsch: Modern Fluoroorganic Chemistry Synthesis, Reactivity, Applications . John Wiley & Sons, 2006, ISBN 978-3-527-60419-7 , pp. 243 ( limited preview in Google Book search).

[DOI10.1021/jp961519d-10] Alexander V. Benderskii, Charles A. Wight: Conformational Isomerization of 1,2-Difluoroethane in Solid Argon: Cage-Modified Reaction Barriers. In: The Journal of Physical Chemistry . 100, 1996, pp. 14958-14961, doi : 10.1021 / jp961519d .