Which reagent converts a Haloalkane to an Aminoalkane?

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Multiple Choice

Which reagent converts a Haloalkane to an Aminoalkane?

Nucleophilic substitution of haloalkanes by ammonia to form amines. Ammonia acts as the nucleophile and displaces the halogen in an SN2 process, giving an ammonium salt that, with heating or excess ammonia, yields the aminoalkane (a primary amine). Heating with warm ammonia is key because it drives the substitution and prevents formation of other products, pushing the reaction toward the amine rather than staying as the ammonium salt. The other reagents don’t achieve this transformation: hydrogenation with H2/Ni would remove the halogen to give an alkane, not an amine; bromine would not introduce an amino group; water would tend to replace the halogen with a hydroxyl group rather than with nitrogen.

Nucleophilic substitution of haloalkanes by ammonia to form amines. Ammonia acts as the nucleophile and displaces the halogen in an SN2 process, giving an ammonium salt that, with heating or excess ammonia, yields the aminoalkane (a primary amine). Heating with warm ammonia is key because it drives the substitution and prevents formation of other products, pushing the reaction toward the amine rather than staying as the ammonium salt. The other reagents don’t achieve this transformation: hydrogenation with H2/Ni would remove the halogen to give an alkane, not an amine; bromine would not introduce an amino group; water would tend to replace the halogen with a hydroxyl group rather than with nitrogen.

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