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(E)-1,4-Dibromobut-2-ene

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(E)-1,4-Dibromobut-2-ene Basic information

Product Name:
(E)-1,4-Dibromobut-2-ene
Synonyms:
  • (2E)-1,4-Dibromo-2-butene
  • (E)-1,4-Dibromo-2-butene
  • 1,4-Dibromo-2-butene, E
  • 1,4-trans-Dibromobutene-2
  • 2-Butene, 1,4-dibromo-, trans-
  • 4-dibromo-(e)-2-buten
  • 1,4-DIBROMO-2-PENTENE
  • Trans1butene4-dibroMo -2-
CAS:
821-06-7
MF:
C4H6Br2
MW:
213.9
EINECS:
212-472-7
Product Categories:
  • medical intermediates
  • aliskiren
  • Alkenyl
  • Halogenated Hydrocarbons
  • Organic Building Blocks
  • bc0001
  • 821-06-7
Mol File:
821-06-7.mol
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(E)-1,4-Dibromobut-2-ene Chemical Properties

Melting point:
48-51 °C(lit.)
Boiling point:
205 °C(lit.)
Density 
1.9393 (estimate)
refractive index 
1.5361 (estimate)
Flash point:
113°C
storage temp. 
2-8°C
solubility 
Chloroform (Slightly), Methanol (Slightly)
form 
Crystals or Crystalline Powder
color 
colorless to slightly brown
Water Solubility 
slightly soluble
BRN 
1719696
Stability:
Light Sensitive
InChIKey
RMXLHIUHKIVPAB-OWOJBTEDSA-N
CAS DataBase Reference
821-06-7(CAS DataBase Reference)
NIST Chemistry Reference
2-Butene, 1,4-dibromo-, (E)-(821-06-7)
EPA Substance Registry System
2-Butene, 1,4-dibromo-, (2E)- (821-06-7)
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Safety Information

Hazard Codes 
T,C
Risk Statements 
25-34-23/25
Safety Statements 
26-36/37/39-45-28A
RIDADR 
UN 2923 8/PG 2
WGK Germany 
2
RTECS 
EM4725000
8-19
Hazard Note 
Toxic/Corrosive
HazardClass 
6.1(b)
PackingGroup 
III
HS Code 
29033990

MSDS

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(E)-1,4-Dibromobut-2-ene Usage And Synthesis

Chemical Properties

white to light yellow crystal powde

Uses

(2E)-1,4-Dibromo-2-butene, is used as a reagent in the preparation of diaminoalkenes though copper-mediated diamination reaction.

Synthesis Reference(s)

The Journal of Organic Chemistry, 36, p. 3324, 1971 DOI: 10.1021/jo00821a012

General Description

Crystals or white crystalline solid.

Air & Water Reactions

(E)-1,4-Dibromobut-2-ene may be sensitive to exposure to light and air. Insoluble in water.

Reactivity Profile

(E)-1,4-Dibromobut-2-ene is incompatible with strong oxidizers and strong bases.

Fire Hazard

(E)-1,4-Dibromobut-2-ene is probably combustible.

Purification Methods

Crystallise the dibromide from ligroin and/or distil it in a vacuum. [Beilstein 1 IV 79.]

(E)-1,4-Dibromobut-2-ene Preparation Products And Raw materials

Preparation Products

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