Question

The compound T is:

(A) Glycine.
(B) Alanine.
(C) Valine.
(D) Serine.

Answer 1

The resonance structures of Alanine are drawn by first displacing the lone pair of electrons on the nitrogen to the bond between $C$ and $N.$ This results in formation of a double bond between $C$ and $N$ with $N$ getting a positive charge due to the donation of electrons.

Complete answer:
Alanine has the chemical formula $C{{H}_{3}}-CH(N{{H}_{2}})-COOH$. It is an organic compound that consists of a phenyl group attached to an amine group. Alanine is considered to be the simplest aromatic amine. Alanine has the odour of a rotten.
The chemical reaction is given by;

The valency of $C$ is $4.$ This means that $C$ can form $4$ bonds. As $C-1$ already had $4$ bonds, the electrons on $C=C$ pi bond move to the adjacent $C-2$ atom and the $C-2$ atom gets a negative charge. This is how the second structure is formed.

Similarly, the negative on the $C-2$ atom will displace to the adjacent bond. The pi electrons on the adjacent bond then move to the $C-4$ atom and it gets a negative charge. This is how the third structure is formed.
Next, the negative on the $C-4$ atom will displace to the adjacent bond. The pi electrons on the adjacent bond then move to the $C-6$ atom and it gets a negative charge. This is how the T structure is formed.
Therefore, Correct answer is option B i.e., Alanine.

Note:
Alanine has a wide range of uses.
-It is used in rubber accelerators and antioxidants.
-Alanine is also an ingredient in dyes.
-It is used in pharmaceuticals and petroleum refining