2,7-DibroMocarbazole(2,7-DBC)
2,7-DIBROMO-9H-CARBAZOLE
CAS: 136630-39-2
Molecular Formula: C12H7Br2N
2,7-DibroMocarbazole(2,7-DBC) - Names and Identifiers
| Name | 2,7-DIBROMO-9H-CARBAZOLE |
| Synonyms | K0125 2,7-Dibromocarbazole 2,7-dibromocarbazole 2,7-DIBROMOCARBAZOLE 2,7-Dibrom-9H-carbazol 2,7-DIBROMO-9H-CARBAZOLE 9H-Carbazole, 2,7-dibroMo- 2,7-DibroMocarbazole(2,7-DBC) N,N-Bis(M-tolyl)benzenaMine,2,7-DibroMo-9H-carbazole, 9H-Carbazole |
| CAS | 136630-39-2 |
| EINECS | 679-869-9 |
| InChI | InChI=1/C12H7Br2N/c13-7-1-3-9-10-4-2-8(14)6-12(10)15-11(9)5-7/h1-6,15H |
| InChIKey | QPTWWBLGJZWRAV-UHFFFAOYSA-N |
2,7-DibroMocarbazole(2,7-DBC) - Physico-chemical Properties
| Molecular Formula | C12H7Br2N |
| Molar Mass | 325 |
| Density | 1.930±0.06 g/cm3(Predicted) |
| Melting Point | 230.0 to 234.0 °C |
| Boling Point | 459.0±25.0 °C(Predicted) |
| Flash Point | 231.4°C |
| Vapor Presure | 3.58E-08mmHg at 25°C |
| Appearance | White to yellow to brown powder or crystal |
| Color | White to Light yellow |
| Odor | Off White?powder |
| pKa | 15.13±0.30(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.796 |
| MDL | MFCD09033507 |
2,7-DibroMocarbazole(2,7-DBC) - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R25 - Toxic if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | 2811 |
| WGK Germany | 3 |
| HS Code | 29339900 |
| Hazard Class | 6.1 |
| Packing Group | Ⅲ |
2,7-DibroMocarbazole(2,7-DBC) - Reference Information
| introduction | at present, the application research of carbazole compounds in the field of photoelectric materials has involved organic photoelectric molecular devices, electrophotographic materials, solar cell materials, color liquid crystal materials and organic optical information recording materials and other cutting-edge scientific and technological fields, showing broad application prospects. Some small molecular carbazole derivatives play a very important role in organic electroluminescent materials. For example, 2, 7-dibromocarbazole is a very promising intermediate in blue light materials. |
| use | 2,7-dibromocarbazole is an important organic chemical intermediate, which can be used to further synthesize organic electroluminescent materials for new generation displays and hole transport materials, luminescent materials, new pesticides and medicines in organic polymer solar cells. Carbazole and its derivatives are a kind of heterocyclic aromatic compounds, which have large π-electron conjugation system and strong intramolecular electron transfer characteristics. They have excellent photoelectric properties and are widely used in pigments, dyes, fragrances, medicines and pesticides. |
| application | 2,7-dibromocarbazole can be used as an intermediate in organic synthesis and a chemical and pharmaceutical intermediate, and can be used in laboratory research and development processes and intermediates in dyes and pigments. |
| preparation | 40g(0.128mol) of 4,4 '-dibrominated biphenyl, 0.2g(1.32mmol) of ferrous sulfate and 1,2? 80mL of dichloroethane was added into a 250mL three-neck bottle, slowly heated to 1,2-dichloroethane and began to reflux. 50mL(0.25mol) of 5mol/L dilute nitric acid was slowly dropped into the reaction bottle, the temperature of the system was maintained at 80 ℃ for 2 hours, and no raw materials were detected by HPLC. The reaction solution is cooled to room temperature, stratified, and the organic phase of the lower layer is collected. The aqueous phase is extracted with 10 mL1, 2-dichloroethane once, the organic phase is combined, and the reduced pressure distillation recovers 1, 2-dichloroethane After the crude product. Methanol was added to the crude product, stirred and heated until the solid was completely dissolved, crystals were precipitated after natural cooling, suction and filtration under reduced pressure, and vacuum drying was carried out to obtain 42.4g of 2-nitro-4,4 '-dibrominated biphenyl light yellow powder with 92.6% yield. Under the protection of nitrogen, 2-nitro -4,4 '-dibrominated biphenyl 42.84g(0.12mol), 2-diphenylphosphine-biphenyl 93.05g(0.275mol) and dichloromethane 200mL were added to a 500mL three-neck bottle, and stirred for 3h at room temperature. Recovery of dichloromethane by vacuum distillation. The residue is passed through the column with 200~400 mesh silica gel as stationary phase and petroleum ether/ethyl acetate (volume ratio 8:2) as eluent to obtain 34.2g of white-like powder, namely 2,7-dibromocarbazole, with a yield of 87.7% |
Last Update：2024-04-10 22:29:15
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