Question

in the reaction

MgBr+CH3NH2 Dry ether the number of possible isomers for the organic compound is 

• A. 2
• B. 4
• C. 5
• D. 3

Answer 1

The Correct Option is A

In this reaction, ethylmagnesium bromide (CH\(_3\)CH\(_2\)MgBr) reacts with methylamine (CH\(_3\)NH\(_2\)) to form an organic compound X. The reaction proceeds as follows:

1. Nucleophilic Attack: The nucleophilic amine group (NH\(_2\)) attacks the electrophilic carbon atom in the ethyl group (CH\(_3\)CH\(_2\)) attached to the magnesium bromide, resulting in the formation of a new carbon-nitrogen bond.
2. Possibility of Isomers: The two possible isomers arise due to the two possible positions where the CH\(_3\) group can attach to the nitrogen atom. This results in two distinct amine compounds.

The two isomers are:
N-Ethylmethylamine: CH\(_3\)CH\(_2\)NH\(_2\) (ethyl group attached to nitrogen).
N-Methylmethylamine: CH\(_3\)NH\(_2\) (methyl group attached to nitrogen).

Thus, the number of possible isomers for X is 2.