Final answer:
The molecule that does not have delocalized electrons among the provided options is the cyclohexyl radical, as it does not exhibit resonance and the unpaired electron is localized to one atom. A is the correct answer.
Step-by-step explanation:
The question is focused on determining which molecule does not have delocalized electrons. Delocalized electrons are those that can move freely across multiple atoms, rather than being confined to a single bond or pair of atoms. Looking through the options provided:
- (a) cyclohexyl radical
- (b) allyl cation
- (c) O₃ (ozone)
- (d) CO₃²⁻ (carbonate ion)
- (e) benzyl anion
Options (b), (c), and (d) are known to have delocalized electrons due to resonance structures, a feature of certain molecules where the bonding can be represented by multiple structures.
The benzyl anion (e) also has delocalized electrons due to the presence of a benzene ring adjacent to the negative charge allowing for the charge to be spread over the ring. However, the cyclohexyl radical (a) does not possess delocalized electrons as it has a single unpaired electron that is localized to one atom within the molecule without resonance structures to delocalize it. Thus, the mentioned correct option in final answer for the molecule that does not have delocalized electrons is (a) cyclohexyl radical.