TRANS-1,4-DIBROMO-2-BUTENE
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TRANS-1,4-DIBROMO-2-BUTENE
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CAS No:
6974-12-5
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Formula:
C4H6Br2
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Chemical Name:
TRANS-1,4-DIBROMO-2-BUTENE
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Synonyms:
TRANS-1,4-DIBROMOBUT-2-ENE;1,4-dibromo-2-buten;2-Butene, 1,4-dibromo-;Nsc23187;Wln: E2U2e;TL 80;tl80;Cis-1,4-DibromoButene
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CAS No:
Description
PHYSICAL DESCRIPTION: Crystals or white crystalline solid. (NTP, 1992)
Thallus crystal. The melting point is 54°C and the boiling point is 74-76°C (0.24kPa).
Characteristics
0
2.1
colorless to slightly brown
1.9393 (estimate)
48-51 °C(lit.)
205 °C(lit.)
113 °C
1.5430 (estimate)
less than 1 mg/mL at 66° F (NTP, 1992)
0-6°C
Sealed in dry,2-8°C
Safety Information
UN 2923 8/PG 2
2
T
26-36/37/39-45
EM4725000
T
P201, P202, P260, P261, P264, P270, P271, P272, P273, P280, P281, P284, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P312, P320, P321, P322, P330, P333+P313, P361, P363, P391, P403+P233, P405, P501
25-34
UN 2923 8/PG 2
TRANS-1,4-DIBROMO-2-BUTENE Use and Manufacturing
From 1, 3-butadiene and bromine reaction. Add 126g of liquid 1, 3-butadiene to 250ml of carbon tetrachloride solution cooled to -5-15°C, and add 76ml of bromine dissolved in 100ml of carbon tetrachloride solution dropwise with stirring. After standing for two days, evaporate carbon tetrachloride under reduced pressure, add about 1 volume of petroleum ether, the temperature is 60-90℃, and filter while it is hot. After the filtrate is cooled, 172.8g of dibromide is precipitated. After standing for 10d, 78.5g is precipitated. A total of 251.3g of finished product was obtained, and the yield was 79%.
Used as an intermediate in organic synthesis.
Computed Properties
Molecular Weight:213.90
XLogP3:2.1
Rotatable Bond Count:2
Exact Mass:213.88158
Monoisotopic Mass:211.88363
Heavy Atom Count:6
Complexity:34.8
Undefined Bond Stereocenter Count:1
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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