Tetraphenylphsohonium bromide
Tetraphenylphosphonium bromide
CAS: 2751-90-8
Molecular Formula: C24H20BrP
Tetraphenylphsohonium bromide - Names and Identifiers
Tetraphenylphsohonium bromide - Physico-chemical Properties
| Molecular Formula | C24H20BrP |
| Molar Mass | 419.29 |
| Melting Point | 295-300 °C (lit.) |
| Flash Point | 260 °C |
| Water Solubility | Soluble in water. |
| Appearance | White to white-like crystals |
| Color | White to off-white |
| Merck | 14,9237 |
| BRN | 3922383 |
| Storage Condition | Inert atmosphere,Room Temperature |
| Stability | hygroscopic |
| Sensitive | Hygroscopic |
| MDL | MFCD00011915 |
| Physical and Chemical Properties | White needle-like crystals, mp:294-296 ℃, slightly soluble in cold water, soluble in hot water, ethanol, ether, benzene, tetrahydrofuran and other organic solvents. |
| Use | Used as phase transfer catalyst |
Tetraphenylphsohonium bromide - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - 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. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10 |
| TSCA | Yes |
| HS Code | 29310095 |
Tetraphenylphsohonium bromide - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | Tetraphenylphosphine bromide is a phase transfer catalyst (Phase transfer catalyst). The application is a new technology developed in the past two decades. It overcomes the shortcomings of the need for polar aprotic solvents in heterogeneous organic synthesis, and can make the heterogeneous reaction proceed under relatively mild conditions, speed up the reaction rate and increase the yield, therefore, it has greatly promoted the development of organic synthesis. |
| preparation | 786g of triphenylphosphorus, 702g of benzene bromide and 196g of catalyst (including 25g of nickel chloride and 171g of zinc chloride) are sequentially added to the 5L reaction kettle, reacted at 190°C for 10 to 12h, then cooled to 100°C, then pure water is added to the reaction kettle, the reaction solution is kept warm for 3h, then allowed to stand until stratified, and then separated, the organic phase is recovered and used for the next batch of reuse; the water phase is recovered and further stirred and cooled to room temperature, then filtered and washed until the catalyst ions are not detected in the fresh filtrate, the resulting filtrate is collected, and the water is evaporated to dry and the catalyst is recovered. In addition, the obtained filter cake was dried at 70~140°C to obtain 982g of white tetraphenylphosphorus bromide, the product yield was 82%, the catalyst recovery rate was 92%, and the bromobenzene recovery rate was 96%. |
| Use | Used as a phase transfer catalyst Supporting electrode for the electrolytic reduction of Buckminster fullerene Supporting electrolyte for electroreduction of fullerene. |
Last Update：2024-04-10 22:29:15
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