1-Bromo-2-methylbutane is a compound with the molecular formula C₅H₁₁Br. It is an alkyl halide, specifically a bromoalkane.
The compound is a derivative of butane in which a hydrogen atom on the second carbon is replaced by a bromine atom, and a methyl group is present on the second carbon.
The IUPAC name for this compound is 2-bromo-2-methylbutane. The numbering of carbon atoms in the parent chain is based on giving the bromine substituent the lowest possible number. In this case, the bromine is on the second carbon, and the methyl group is on the second carbon as well. The condensed structural formula for 1-bromo-2-methylbutane is CH₃CHBrCH(CH₃)CH₃.