If the amino group of Glycine and carboxylic acid group of Alanine undergo elimination of wter molecule, the name of the compound thus formed is

Options

A. Alanylglycine (dipeptide)
B. Glycylalanide (tri peptide)
C. Glycylalanine (dipeptide)
D. Alanylglycine (dipeptide)

Answer

To solve the problem, we need to analyze the reaction between glycine and alanine, focusing on the elimination of a water molecule and the formation of a new compound. Here’s a step-by-step breakdown:

### Step 1: Identify the Structures of Glycine and Alanine
- **Glycine (Gly)**: The structure is NH₂-CH₂-COOH. It has an amino group (NH₂) and a carboxylic acid group (COOH).
- **Alanine (Ala)**: The structure is NH₂-CH(CH₃)-COOH. It also has an amino group (NH₂) and a carboxylic acid group (COOH), but with a side chain (R group) of CH₃.

**Hint**: Remember that amino acids have both an amino group and a carboxylic acid group.

### Step 2: Understand the Reaction
- The question states that the amino group of glycine and the carboxylic acid group of alanine undergo elimination of a water molecule (H₂O).
- This means that glycine will lose its NH₂ group (specifically, one hydrogen atom from it), and alanine will lose the OH from its COOH group.

**Hint**: The elimination of water typically occurs in condensation reactions, where two molecules combine and release water.

### Step 3: Form the New Compound
- After the elimination of water, the remaining parts of glycine and alanine will bond together.
- The remaining part of glycine will be the carbon (C) that was attached to the amino group, and the remaining part of alanine will be the nitrogen (N) from its amino group.
- This forms a bond between the carbon of alanine and the nitrogen of glycine, creating a peptide bond.

**Hint**: A peptide bond is formed between the carboxyl group of one amino acid and the amino group of another.

### Step 4: Name the New Compound
- The compound formed is a dipeptide because it consists of two amino acids.
- According to the convention of naming dipeptides, the amino acid that contributes the carboxylic acid group is named first, followed by the amino acid that contributes the amino group.
- In this case, alanine (which loses its carboxylic acid group) is named first, followed by glycine (which loses its amino group).

**Hint**: The order of naming in dipeptides is based on which amino acid loses which functional group.

### Final Answer
The name of the compound formed is **alanine glycine dipeptide**.

### Summary of Steps
1. Identify the structures of glycine and alanine.
2. Understand the elimination of water and how it occurs.
3. Form the new compound by creating a peptide bond.
4. Name the compound according to the rules of dipeptide nomenclature.