Identify the correct ascending order of reactivity of alkyl halides:
Correct answer: B. F, CI, Br, I
- A. Cl, Br, I, F
- B. F, CI, Br, I
- C. Br, I, F, CI
- D. I, F, Cl, Br
Explanation
The correct reactivity order of alkyl halides is R-F < R-Cl < R-Br < R-I because the C-F bond is the strongest (making fluorine the least reactive), and the C-I bond is the weakest (making iodine the most reactive).The order F, Cl, Br, I is correct because reactivity increases as bond strength decreases, meaning fluorine is the least reactive, and iodine is the most reactive due to its weak C-I bond and excellent leaving group ability.
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About Nomenclature, Structure and Reactivity
Alkyl halides are named by selecting the longest carbon chain and locating the halogen substituent, while their structures are classified as primary, secondary or tertiary. Their reactivity includes nucleophilic substitution and elimination, with the behaviour of leaving groups and the distinction between SN1 and SN2 mechanisms linked to substrate structure.
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