Final answer:
The structures described with different substituent arrangements on a benzene ring are indeed isomers, specifically positional isomers, which are a type of structural isomers. The term 'isomers' refers to molecules with the same molecular formulas but different arrangements of atoms. Enantiomers, as another form of isomers, are actual mirror images with a requirement for four different groups attached to a central carbon.
Step-by-step explanation:
The original question poses whether two structures that depict different arrangements of substituents on a benzene ring would be considered isomers. The correct answer is True. Isomers are molecules that have the same molecular formula but differ in the arrangement of atoms. In the case of the hexagonal structure of benzene shown, with one hydrogen replaced by a chlorine atom and another hydrogen replaced by a CH3 group, the different arrangements can either be next to each other (ortho position) or separated by two carbons (meta position). These constitute different structural isomers known as positional isomers, which is one type of structural isomers. The structures described are indeed different isomers of chloromethylbenzene.
Structural isomers have different covalent arrangements of atoms, while geometric isomers (or cis-trans isomers) have different arrangements of atoms around a double bond. This concept is complemented by enantiomers, which are nonsuperimposable mirror images of each other and must have four different atoms or groups connected to a central carbon to be considered as such.
To clarify some related concepts: aldehydes, amides, carboxylic acids, esters, and ketones all contain carbonyl groups (carbonyl groups). The term enantiomers specifies molecules that are mirror images, not merely those with the same types and numbers of atoms but different bonding sequences; the latter is a description of structural isomers.