C4H9Br

C4H9Br is the chemical formula for several isomeric organic compounds, all of which are bromobutanes. The general formula C4H9 represents the butyl group, and Br represents a bromine atom. The different isomers arise from the position of the bromine atom on the four-carbon chain, or the branching of the carbon chain.

The possible isomers are 1-bromobutane, 2-bromobutane, isobutyl bromide (1-bromo-2-methylpropane), and tert-butyl bromide (2-bromo-2-methylpropane). These compounds are generally colorless liquids with characteristic odors. They are typically synthesized through the reaction of butanol isomers with hydrobromic acid or phosphorus tribromide.

Bromobutanes are used as alkylating agents in organic synthesis. For example, they can be used to introduce a butyl group into other molecules, forming new carbon-carbon bonds. They are also employed in the production of Grignard reagents, which are important intermediates in the synthesis of various organic compounds. Due to their relatively high reactivity, they are often handled with care and stored properly. Their specific physical and chemical properties vary depending on the isomer.