reactivity of halogens

Question

The order of reactivity of halides in nucleophilic substitution is:

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The reactivity of alkyl halides toward nucleophilic substitution ($S_N1$ or $S_N2$) is determined by the **Bond Dissociation Enthalpy** of the $C-X$ bond.
- As the halogen increases in size $(F 	o Cl 	o Br 	o I)$, the $C-X$ bond becomes longer and weaker.
- **Bond Strength**: $C-F > C-Cl > C-Br > C-I$
- Because the $C-I$ bond is the easiest to break, alkyl iodides release the leaving group most readily, making them the **most reactive**.

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reactivity of halogens

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