Which of the following alkyl halide is most reactive towards Mg atom?
Correct answer: D. Alkyl iodide
- A. Alkyl bromide
- B. Alkyl fluoride
- C. Alkyl chloride
- D. Alkyl iodide
Explanation
Grignard reagent is formed by the reaction of alkyl halide or aryl halide with Mg. Mg replaces the halogen in alkyl halide as the C-X bond is broken. As we move from C-F to C-I, the bond energy decreases as the size of the halogen increases hence reactivity also increases.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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