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:
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.
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.
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In this reaction, ethylmagnesium bromide (CH$_3$CH$_2$MgBr$)$ reacts with methylamine (CH$_3$NH$_2$) in dry ether, leading to the formation of an imine. The organic compound X will have the structure of an amine. Since the nucleophilic substitution occurs at the carbon attached to the magnesium bromide (CH$_3$CH$_2$), the structure of X will be a substituted amine.
The number of possible isomers depends on the different possible positions of the ethyl and methyl groups on the nitrogen atom. The possible isomers for the compound X include: (1) Ethylmethylamine (2) Methyl ethylamine (3) The position of the nitrogen on a substituted amine (4) The geometrical isomer due to symmetry.
are isomeric compounds. 
are functional group isomers.