✔ 最佳答案
This is an SN2 reaction because
• 1-iodopropane is a primary iodoalkane which does not favor SN1 reaction because the primary carbocation (carbonium) ion formed in SN1 mechanism is unstable. However, a primary iodoalkane favors nucleophilic attack in SN2 mechanium.
• Hydroxide ion is an effective nucleophile.