Final answer:
The nucleophilic site of eugenol is the oxygen atom, while the electrophilic site is the benzene ring.
Step-by-step explanation:
The correct answer is a) Nucleophilic: Oxygen, Electrophilic: Benzene ring.
Eugenol is a compound found in cloves and has a benzene ring structure with an oxygen atom bonded to it. The oxygen atom in eugenol has a lone pair of electrons, which makes it a nucleophilic site. The benzene ring, on the other hand, is electron-deficient and can attract electron-rich species, making it an electrophilic site.
It is important to note that while benzene can act as a nucleophile in certain reactions, its nucleophilic character is weak due to the loss of aromatic stabilization when donating electrons. Therefore, in the context of eugenol, the primary nucleophilic site is the oxygen atom.