C3H7Br

C3H7Br is the molecular formula for a group of organobromine compounds that contain three carbon atoms, seven hydrogens, and one bromine. The formula encompasses two constitutional isomers: 1-bromopropane (n-propyl bromide) and 2-bromopropane (isopropyl bromide). Their structures are CH3-CH2-CH2-Br for 1-bromopropane and CH3-CHBr-CH3 for 2-bromopropane.

Physically, both isomers are typically colorless liquids at room temperature, with boiling points that differ due to branching and symmetry. 2-Bromopropane is generally more compact and often has a lower boiling point than 1-bromopropane. Like other alkyl bromides, C3H7Br compounds are relatively reactive and can serve as alkylating agents in organic synthesis. They are used as intermediates in the preparation of propyl derivatives and can participate in nucleophilic substitution and elimination reactions.

Preparation methods commonly involve substitution of propanol with hydrobromic acid or phosphorus tribromide, or the radical bromination of propane. The choice of route depends on the desired isomer. In typical reactions, the bromide can be converted to Grignard reagents (propylmagnesium bromide) or used to form a variety of propyl-containing products.

Safety and handling information is important: alkyl bromides are generally flammable and can be irritating to the skin, eyes, and respiratory system. They should be handled in a well-ventilated area with appropriate protective equipment. They can slowly hydrolyze in water to form propanol and hydrobromic acid, and should be stored away from strong oxidizers.