Final answer:
The IUPAC name for the compound C₆H₅CH₂CH₂CH₂Cl is 3-chloropropylbenzene, with the chlorine atom positioned on the third carbon of the propyl chain attached to a benzene ring.
Step-by-step explanation:
The compound represented by the molecular formula C₆H₅CH₂CH₂CH₂Cl is an organic molecule consisting of a benzene ring (C₆H₅) and a three-carbon alkyl chain (propyl) with a chlorine atom at the end. To name this compound using the rules of IUPAC nomenclature, we first identify the longest carbon chain attached to the benzene ring, which in this case is the propyl group. The benzene ring is considered as a substituent and is named phenyl when it is not part of the main chain.
Since there are three carbons in the alkyl chain, we name this part as 'propyl'. The chlorine atom is indicated with the prefix 'chloro'. Since the chlorine atom is attached to the third carbon in the propyl chain, we indicate its position with the number '3'. Hence, the IUPAC name of the compound is 3-chloropropylbenzene.