Question

Bromoethane to propanamine

Answer 1

Final answer: Bromoethane is treated with $KCN$ the resulting product undergoes reduction using $LiAlH_{4}$ or catalytic hydrogenation, to give propanamine.

Given that: We are given bromoethane and propanamine.

To find: We have to find how to convert bromoethane to propanamine.

Explanation:

• Chemical formula:

Bromoethane: $CH_{3}CH_{2}Br$

Propanamine: $CH_{3}CH_{2}CH_{2}NH_{2}$

• Bromoethane is treated with $KCN$, due to which the $-CN$ group attaches to the $-CH_{2}$ group where the bromine ($Br$) group is attached. At the same time, the bromine group is eliminated as $KBr$ and leading to the conversion of bromoethane to cyanoethane.

                                             $KCN$

The reaction: $CH_{3}CH_{2}Br$  ──→ $CH_{3}CH_{2}CN$

                   $Bromoethane$   $-KBr$   $Cyanoethane$

Now the cyanoethane is converted to propanamine in two ways.

• It treats with Lithium aluminium hydride ($LiAlH_{4}$).

                                                           $LiAlH_{4}$

The chemical reaction: $CH_{3}CH_{2}CN$  ──→ $CH_{3}CH_{2}CH_{2}NH_{2}$

                                     $Cyanoethane$                 $Propanamine$

• It undergoes catalytic hydrogenation.

                                                                $H_{2}$

The chemical reaction: $CH_{3}CH_{2}CN$   ──→ $CH_{3}CH_{2}CH_{2}NH_{2}$

                                     $Cyanoethane$      $Ni$        $Propanamine$

• Cyanoethane is a nitrile compound while propanamine is a primary amine. So nitrile can be converted to a primary amine by reduction using $LiAlH_{4}$ or catalytic hydrogenation can be used.

To know more about the concept please go through the links

https://brainly.in/question/50951639

https://brainly.in/question/1519560

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