Bromobenzene refers specifically to a compound where a single bromine atom is bonded to one carbon in the benzene ring, not to every carbon. The designation of 1-bromobenzene indicates that the bromine is attached to one specific carbon, but the exact position is not critical due to the symmetrical nature of the benzene ring. When naming compounds like 1-ethylbenzene, the ethyl group is attached to one of the carbons in the ring, and the position of the bromine can vary without altering the molecule's identity. The ability to rotate the benzene ring means that the orientation of the bromine does not affect the overall structure. Therefore, bromobenzene is understood to mean 1-bromobenzene, with the specific carbon position being less significant.