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| CAS No.: | 3141-26-2 |
|---|---|
| Name: | 3,4-Dibromothiophene |
| Article Data: | 43 |
| Molecular Structure: | |
|
|
|
| Formula: | C4H2Br2S |
| Molecular Weight: | 241.934 |
| Synonyms: | Thiophene, 3,4-dibromo- (8CI)(9CI);Thiophene, 3,4-dibromo-;3,4-Dibromo Thiophene; |
| EINECS: | 221-546-8 |
| Density: | 2.174 g/cm3 |
| Melting Point: | 4-5 °C(lit.) |
| Boiling Point: | 221.5 °C at 760 mmHg |
| Flash Point: | 90.4 °C |
| Appearance: | clear colorless to yellow liquid |
| Hazard Symbols: |
 Xi, Xn
|
| Risk Codes: | 36/37/38-20/21/22 |
| Safety: | 26-36-36/37/39 |
| PSA: | 28.24000 |
| LogP: | 3.27310 |
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| Conditions | Yield |
|---|---|
| With acetic acid; zinc In water at 20℃; | 92% |
| With hydrogen bromide; cadmium(II) chloride In methanol; dichloromethane at 35℃; for 5h; | 89% |
| In methanol; dichloromethane at 35℃; for 5h; Product distribution; electrolysis in presence of CdCl2 and HBr at 1 A (83 mA/cm2), 13.5-11.5 V; other conditions and other bromothiophenes investigated; | 89% |
| Conditions | Yield |
|---|---|
| Stage #1: Tetrabromothiophene With n-butyllithium In diethyl ether; hexane at 0℃; for 1.66667 - 1.83333h; Argon atmosphere; Stage #2: C4Br2Li2S With water at 0℃; | 77% |
| Conditions | Yield |
|---|---|
| In N,N-dimethyl-formamide divided cell electrolysis at constant potential (-1.70 V); 0.1 M tetraethylammonium bromide, mercury electrode; | A 74% B 3% |
| Conditions | Yield |
|---|---|
| With sodium amide; ferric nitrate In ammonia | A 72% B n/a |
- 1003-09-4
2-bromothiophene
A
- 3141-26-2
3,4-dibromothiophene
B
- 3141-24-0
2,3,5-tribromothiophene
C
- 3141-25-1
2,3,4-tribromothiophene
D
- 3958-03-0
Tetrabromothiophene
| Conditions | Yield |
|---|---|
| With potassium tert-butylate; sodium amide In ammonia for 3h; Further byproducts given; | A 65% B n/a C n/a D n/a |
| Conditions | Yield |
|---|---|
| In N,N-dimethyl-formamide divided cell electrolysis at constant potential (-1.20 V); 0.1 M tetraethylammonium bromide, mercury electrode; | 60% |
| With methyl bromide; diethyl ether; magnesium Erhitzen des Reaktionsprodukts mit Wasserdampf; |
| Conditions | Yield |
|---|---|
| Stage #1: thiophene With bromine In chloroform for 4h; Heating; Stage #2: With acetic acid; zinc In water Heating; | A 23% B 51% |
- 39129-54-9
3,4-dibromo-2,5-dimethylthiophene
A
- 3141-26-2
3,4-dibromothiophene
B
- 70061-39-1
3,4-dibromo-2,5-dimethylthiophene-1,1-dioxide
C
- 508170-24-9
C6H2Br2O3S
D
- 301677-76-9
3,4-Dibromo-2,5-dimethylthiophene S-monoxide
| Conditions | Yield |
|---|---|
| With aluminum oxide; ferric hydroxide; ethylenediaminetetraacetic acid; dihydrogen peroxide In methanol; water at 50 - 55℃; for 5h; Mechanism; | A 36% B 10% C 16% D 30% |
| In methanol; water at 50 - 55℃; for 5h; Mechanism; | A 8% B 10% C 16% D 30% |
| Conditions | Yield |
|---|---|
| With methyl bromide; diethyl ether; magnesium Behandeln des Reaktionsprodukts mit Wasser; |
- 3141-27-3
2,5-dibromothiophen
A
- 188290-36-0
thiophene
B
- 1003-09-4
2-bromothiophene
C
- 872-31-1
3-Bromothiophene
D
- 3141-26-2
3,4-dibromothiophene
| Conditions | Yield |
|---|---|
| With tetramethylammonium perchlorate In N,N-dimethyl-formamide Product distribution; Mechanism; controlled-potential electrolysis at reticulated vitreous carbon; further reagents; |
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Specification
The 3,4-Dibromothiophene is an organic compound with the formula C4H2Br2S. The IUPAC name of this chemical is 3,4-dibromothiophene. With the CAS registry number 3141-26-2, it is also named as Thiophene, 3,4-dibromo-. The product's categories are Thiophenes; Blocks; Thiazoles; Halides; Heterocycles; Thiophene & Benzothiophene; Miscellaneous; Halogenated; Organohalides; Thiophene; Thiophens; Halogenated Heterocycles; Heterocyclic Building Blocks; Thiophenes Building Blocks. Besides, it is a clear colorless to yellow liquid, which should be stored in a cool and dry place.
Physical properties about 3,4-Dibromothiophene are: (1)ACD/LogP: 3.21; (2)ACD/LogD (pH 5.5): 3.21; (3)ACD/LogD (pH 7.4): 3.21; (4)ACD/BCF (pH 5.5): 162.16; (5)ACD/BCF (pH 7.4): 162.16; (6)ACD/KOC (pH 5.5): 1328.88; (7)ACD/KOC (pH 7.4): 1328.88; (8)Polar Surface Area: 28.24 Å2; (9)Index of Refraction: 1.638; (10)Molar Refractivity: 40.01 cm3; (11)Molar Volume: 111.2 cm3; (12)Polarizability: 15.86×10-24cm3; (13)Surface Tension: 47 dyne/cm; (14)Density: 2.174 g/cm3; (15)Flash Point: 90.4 °C; (16)Enthalpy of Vaporization: 43.93 kJ/mol; (17)Boiling Point: 221.5 °C at 760 mmHg; (18)Vapour Pressure: 0.159 mmHg at 25°C.
Preparation: this chemical can be prepared by tetrabromo-thiophene. This reaction will need reagent Zn and AcOH.
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Uses of 3,4-Dibromothiophene: it can be used to produce 4-bromo-thiophene-3-carbaldehyde. It will need reagent n-BuLi.
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When you are using this chemical, please be cautious about it as the following:
It is harmful by inhalation, in contact with skin and if swallowed. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Besides, this chemical is irritating to eyes, respiratory system and skin. When you are using it, wear suitable gloves and eye/face protection.
You can still convert the following datas into molecular structure:
(1)SMILES: Brc1cscc1Br
(2)InChI: InChI=1/C4H2Br2S/c5-3-1-7-2-4(3)6/h1-2H
(3)InChIKey: VGKLVWTVCUDISO-UHFFFAOYAN
(4)Std. InChI: InChI=1S/C4H2Br2S/c5-3-1-7-2-4(3)6/h1-2H
(5)Std. InChIKey: VGKLVWTVCUDISO-UHFFFAOYSA-N