If the amino group of Glycine and carboyxylic acid group of alanine undergo elimination of water molecule, the name of the compound thus formed is

Options

A. Alanylgycide (dipeptide)
B. Glycyl alanide (tri peptide)
C. Glycyl alanine (dipeptide)
D. Alanylglycine (dipeptide)

Answer

To solve the problem, we need to determine the compound formed when the amino group of glycine and the carboxylic acid group of alanine undergo a condensation reaction, resulting in the elimination of a water molecule.

### Step-by-Step Solution:

1. **Identify the Amino Acids**:
- Glycine (NH2-CH2-COOH)
- Alanine (NH2-CH(CH3)-COOH)

2. **Identify the Functional Groups**:
- Glycine has an amino group (-NH2) and a carboxylic acid group (-COOH).
- Alanine has an amino group (-NH2) and a carboxylic acid group (-COOH).

3. **Reaction Setup**:
- The amino group of glycine will react with the carboxylic acid group of alanine.
- The reaction can be represented as:
\[ \text{NH}_2\text{-CH}_2\text{-COOH} + \text{NH}_2\text{-CH(CH}_3\text{)-COOH} \rightarrow \text{(NH}_2\text{-CH}_2\text{-CO-NH-CH(CH}_3\text{)-COOH)} + \text{H}_2\text{O} \]

4. **Elimination of Water**:
- During the reaction, a water molecule (H2O) is eliminated. This occurs between the amino group of glycine and the carboxylic acid group of alanine.

5. **Formation of Peptide Linkage**:
- The remaining parts of the amino acids bond together, forming a peptide bond (or linkage). The structure now has a carbonyl group (C=O) bonded to the nitrogen (N) from the amino group, which is characteristic of a peptide bond.

6. **Naming the Compound**:
- The compound formed is a dipeptide because it consists of two amino acids.
- The naming convention for peptides is to start from the N-terminal (the end with the amino group) to the C-terminal (the end with the carboxylic acid group).
- The first amino acid (alanine) is modified to "alanil" (removing the "-ine" and adding "-yl").
- The second amino acid (glycine) retains its name.

7. **Final Name of the Compound**:
- The complete name of the dipeptide formed is "Alanil Glycine".

### Conclusion:
The name of the compound formed when the amino group of glycine and the carboxylic acid group of alanine undergo elimination of a water molecule is **Alanil Glycine**, which is also classified as a dipeptide.