Tetraphenylphosphonium bromide cas no 2751-90-8 C24H20BrP

Phase Transfer Catalyst Tetraphenylphosphonium bromide (TPPBr) is an organic compound,its chemical formula is (C6H5)4P+ Br-. Tetraphenylphosphonium bromide CAS No.: 2751-90-8 is commonly used in various chemical and biochemical applications. Tetraphenylphosphonium bromide consists of a phosphorus atom surrounded by four phenyl (C6H5) groups, forming a positively charged phosphonium ion [(C6H5)4P+] that is balanced by a bromide ion (Br-). TPPBr typically appears as white crystalline solid. Its melting point is around 342-344°C (647.6-651.2°F). Tetraphenyl phosphonium bromide (TPPBr)  can be used in organic synthesis as a reagent or catalyst.Due to its well-defined redox potential, it is sometimes used in electrochemical studies.Tetrakis(triphenylphosphine) bromide can be prepared by reacting tetrakis(triphenylphosphine) with hydrogen bromide,It usually reacts in organic solvents such as ether or toluene. The brominated tetraphenylphosphine generated by the reaction can be further purified by crystallization to obtain pure Tetraphenylphosphonium bromide (TPPBr).