1,3-dichloro-2-butene

Structural formula
cis-trans mixture
General
Surname	1,3-dichloro-2-butene
other names	1,3-dichlorobut-2-ene 1,3-DCB
Molecular formula	C 4 H 6 Cl 2
Brief description	colorless liquid
External identifiers / databases
CAS number 926-57-8 (unspec.) 10075-38-4 (2 Z -isomer) 7415-31-8 (2 E isomer) EC number 213-138-3 ECHA InfoCard 100,011,945 PubChem 13556 Wikidata Q60023051
properties
Molar mass	125 g mol −1
Physical state	liquid
density	1.161 g cm −3
Melting point	-81 ° C
boiling point	126 ° C
Vapor pressure	15 hPa (20 ° C, cis ) 20 hPa (20 ° C, trans )
solubility	practically insoluble in water
Refractive index	1.4735 (20 ° C, cis ) 1.4719 (20 ° C, trans )
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 226-301-331-314 P: 210-260-280-302 + 352-305 + 351 + 338-310
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

1,3-dichloro-2-butene is a chemical compound from the group of chlorinated hydrocarbons .

Extraction and presentation

1,3-Dichloro-2-butene can be obtained by reacting 2-chloro-1,3-butadiene and hydrogen chloride with copper (I) chloride as a catalyst. It is also a by-product of the manufacture of chloroprene from butenine .

Individual evidence

1. ↑ ^{a b c d e f g h i} Entry on 1,3-dichloro-2-butene in the GESTIS substance database of the IFA , accessed on January 8, 2020(JavaScript required) .
2. ↑ ^{a b} David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-152.
3. ^ The equilibrium liquid-vapor of the system trans -1,3-dichloro-2-butene-2,3,4-trichloro-1-butene . In: Chem. Zvesti 23, 270-274 (1969).