3,4-dichloro-1-butene

Structural formula
	Simplified structural formula without stereochemistry
General
Surname	3,4-dichloro-1-butene
other names	3,4-dichlorobut-1-en; 3,4-dichlorobutene-1;
Molecular formula	C 4 H 6 Cl 2
Brief description	colorless to yellowish liquid with a slightly pungent odor
External identifiers / databases
EC number	212-079-0
ECHA InfoCard	100.010.981
PubChem	12971
ChemSpider	12431
Wikidata	Q27280624
properties
Molar mass	125.00 g mol −1
Physical state	liquid
density	1.153 g cm −3
Melting point	−61 ° C
boiling point	118.6 ° C
Vapor pressure	17.4 hPa (20 ° C)
solubility	sparingly soluble in water (1.6 g l −1 at 20 ° C); soluble in ethanol and diethyl ether ;
Refractive index	1.4658 (20 ° C)
safety instructions
H and P phrases	H: 226-302-332-341-350-411
	P: 280-273-201-309 + 311-501
Toxicological data	> 2000 mg kg −1 ( LD 50 ,> 2000 mg kg −1 , transdermal ) ; 10.7 mg / l / 4h ( LD 50 , rat , inh. ) ;
	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

3,4-dichloro-1-butene is a chemical compound from the group of aliphatic , unsaturated halogenated hydrocarbons .

Representation and stereochemistry

3,4-dichloro-1-butene can be obtained by chlorination of 1,3-butadiene and subsequent isomerization . This reaction sequence produces racemic 3,4-dichloro-1-butene, i.e. a 1: 1 mixture of

( R ) -3,4-dichloro-1-butene and

( S ) -3,4-dichloro-1-butene.

properties

3,4-dichloro-1-butene is a colorless to yellowish liquid with a slightly pungent odor that is sparingly soluble in water.

use

3,4-dichloro-1-butene is used as an intermediate in syntheses (for example chloroprene ).

safety instructions

The vapors of 3,4-dichloro-1-butene can form an explosive mixture with air ( flash point 30 ° C).

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Entry on 3,4-dichlorobutene in the GESTIS substance database of the IFA , accessed on March 19, 2020(JavaScript required) .
↑ David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data . CRC Press, 1995, ISBN 978-0-8493-0595-5 , pp. 168 ( limited preview in Google Book search).
↑ Data sheet 3,4-dichloro-1-butene, 98% from Sigma-Aldrich , accessed on March 19, 2020 ( PDF ).
↑ ^a ^b Toxicological assessment of 3,4-dichlorobutene-1 (PDF) at the professional association raw materials and chemical industry (BG RCI), accessed on March 19, 2020.

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Entry on 3,4-dichlorobutene in the GESTIS substance database of the IFA , accessed on March 19, 2020(JavaScript required) .

[David_R._Lide-2] David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data . CRC Press, 1995, ISBN 978-0-8493-0595-5 , pp. 168 ( limited preview in Google Book search).

[Sigma-3] Data sheet 3,4-dichloro-1-butene, 98% from Sigma-Aldrich , accessed on March 19, 2020 ( PDF ).

[ToxBew-4] Toxicological assessment of 3,4-dichlorobutene-1 (PDF) at the professional association raw materials and chemical industry (BG RCI), accessed on March 19, 2020.