2,3-Dibromothiophene CAS 3140-93-0
Introduction：Basic information about 2,3-Dibromothiophene CAS 3140-93-0, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
2,3-Dibromothiophene Basic information
| Product Name: | 2,3-Dibromothiophene |
| Synonyms: | 2,3-DibroMothiophene 98%, 3-DibroMothiophene 98%;BUTTPARK 146\50-38;2,3-DIBROMOTHIOPHENE;AKOS 91257;2,3-Dibromothiophene, 98+%;2,3-Dibromothiophene,97%;Thiophene, 2,3-dibromo-;NSC 99003 |
| CAS: | 3140-93-0 |
| MF: | C4H2Br2S |
| MW: | 241.93 |
| EINECS: | 221-542-6 |
| Product Categories: | Thiophene&Benzothiophene;Miscellaneous;Thiophenes;Thiophens;Halogenated Heterocycles;Heterocyclic Building Blocks;ThiophenesBuilding Blocks;Thiophene Series;Heterocycles;Sulfur & Selenium Compounds;Building Blocks;C4 to C6;Chemical Synthesis;Heterocycle-oher series;Halogenated Heterocycles;Heterocyclic Building Blocks;bc0001 |
| Mol File: | 3140-93-0.mol |
2,3-Dibromothiophene Chemical Properties
| Melting point | -17.5°C |
| Boiling point | 218-219 °C (lit.) |
| density | 2.137 g/mL at 25 °C (lit.) |
| refractive index | n |
| Fp | 125 °F |
| storage temp. | Keep in dark place,Inert atmosphere,2-8°C |
| form | liquid |
| color | White to Yellow to Green |
| Specific Gravity | 2.137 |
| Sensitive | Light Sensitive |
| BRN | 107512 |
| InChI | InChI=1S/C4H2Br2S/c5-3-1-2-7-4(3)6/h1-2H |
| InChIKey | ATRJNSFQBYKFSM-UHFFFAOYSA-N |
| SMILES | C1(Br)SC=CC=1Br |
| CAS DataBase Reference | 3140-93-0(CAS DataBase Reference) |
| NIST Chemistry Reference | Thiophene, 2,3-dibromo-(3140-93-0) |
Safety Information
| Hazard Codes | Xn,F,Xi,T |
| Risk Statements | 10-36/37/38-20/21/22-36-25 |
| Safety Statements | 23-24/25-36/37/39-26-16-36-45 |
| RIDADR | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| F | 8 |
| Hazard Note | Flammable/Irritant |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29349990 |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Acute Tox. 3 Oral Eye Irrit. 2 Flam. Liq. 3 |
| Chemical Properties | clear yellowish to brownish liquid |
| Uses | 2,3-Dibromothiophene (cas# 3140-93-0) is a compound useful in organic synthesis. |
| Synthesis | 872-31-1 3140-93-0 The general procedure for the synthesis of 2,3-dibromothiophene from 3-bromothiophene was as follows: 3-bromothiophene (16.3 g, 100 mmol) was added to a suspension of N-bromosuccinimide (NBS, 17.8 g, 100 mmol) in hexane (50 mL), followed by perchloric acid (70% aqueous, 0.7 mL, 5 mol%). The reaction mixture was stirred at room temperature for 24 h, after which potassium carbonate (200 mg) was added to neutralize. The reaction mixture was filtered and the solid was washed with hexane. The organic phases were combined and concentrated and the residue was purified by vacuum distillation. The final product yield was 89%. |
| References | [1] Journal of Organic Chemistry, 1993, vol. 58, # 11, p. 3072 - 3075 [2] Acta chemica Scandinavica (Copenhagen, Denmark : 1989), 1992, vol. 46, # 7, p. 654 - 660 [3] RSC Advances, 2014, vol. 4, # 96, p. 53531 - 53542 [4] Organic Electronics: physics, materials, applications, 2015, vol. 17, p. 167 - 177 [5] Organic Electronics: physics, materials, applications, 2014, vol. 17, p. 167 - 177 |
2,3-Dibromothiophene Preparation Products And Raw materials
| Raw materials | Hexane-->Water-->3-Bromothiophene-->PERCHLORIC ACID-->4,5-DIBROMOTHIOPHENE-2-CARBOXYLIC ACID-->2,4-Dibromothiophene-->Ethylmagnesium bromide-->N-Bromosuccinimide |
| Preparation Products | 2-Formylthiophene-3-boronic acid-->3-Bromothiophene-2-carbaldehyde-->4,5-DIBROMOTHIOPHENE-2-CARBOXALDEHYDE-->4,5-Dibromothiophene-2-sulphonyl chloride-->Thiophene, 2,3-dibromo-5-methyl--->5,7-DODECADIYNE-1,12-DIOL-->3,5-DIBROMO-2-METHYLTHIOPHENE-->3-BROMOTHIOPHENE-2-CARBONITRILE-->3-(TRIMETHYLSILYLETHYNYL)THIOPHENE 97-->2,3-dibromo-5-chlorothiophene |
