Boron Tribromide

[10294-33-4] BBr3 (MW 250.52) InChI = 1S/BBr3/c2-1(3)4 InChIKey = ILAHWRKJUDSMFH-UHFFFAOYSA-N (Lewis acid used for deprotection of OH and NH groups; cleaves ethers or esters to alkyl bromides; bromoborates allene and alkynes) Physical Data: mp −45 °C; bp 91.7 °C; d 2.650 g cm−3. Form Supplied in: colorless, fuming liquid; a 1.0 M solution in dichloromethane and hexane; BBr3·Me2S complex is available as either a white solid or a 1.0 M solution in dichloromethane. Purification: by distillation. Handling, Storage, and Precautions: BBr3 is highly moisture sensitive and decomposes in air with evolution of HBr. Store under a dry inert atmosphere and transfer by syringe or through a Teflon tube. It reacts violently with protic solvents such as water and alcohols. Ether and THF are not appropriate solvents.