In a reaction having both alkyl halide and base, the base will attack on:
Correct answer: C. Beta-hydrogen.
- A. Electrophilic carbon.
- B. Nucelophilic carbon.
- C. Beta-hydrogen.
- D. None of these.
Explanation
The base attacks the beta hydrogen atom instead of the carbon atom that is attached to the halogen. This is known as an elimination reaction, and it occurs when the base is strong enough to abstract a proton from the beta carbon atom, resulting in the formation of a double bond between the alpha and beta carbon atoms and the elimination of the halide ion. This reaction is known as the E2 mechanism. The selectivity between nucleophilic attack and elimination depends on the nature of the base, the structure of the alkyl halide, and the reaction conditions.
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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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