The number of donar sites in mercapto, glycinato, diethylene triamine and `(EDTA)^(4-)` are :-

Options

A. 1,2,3,4
B. 1,2,3,6
C. 1,2,4,6
D. 1,2,2,6

Answer

To solve the question regarding the number of donor sites in mercapto, glycinate, diethylene triamine, and EDTA^(4-), we will analyze each compound step by step.

### Step 1: Analyze Mercapto
- **Structure**: Mercapto contains a thiol group (-SH).
- **Donor Sites**: The sulfur atom (S) in the mercapto group has a lone pair of electrons that can act as a donor site.
- **Conclusion**: Therefore, mercapto has **1 donor site**.

### Step 2: Analyze Glycinate
- **Structure**: Glycinate can be represented as NH2-CH2-COO^-.
- **Donor Sites**:
- The nitrogen (N) atom has a lone pair that can act as a donor site.
- The carboxylate group (COO^-) has a negative charge, which indicates that it can also act as a donor site.
- **Conclusion**: Therefore, glycinate has **2 donor sites** (1 from nitrogen and 1 from the carboxylate).

### Step 3: Analyze Diethylene Triamine
- **Structure**: Diethylene triamine (DETA) has the structure NH2-CH2-CH2-NH-CH2-CH2-NH2.
- **Donor Sites**: Each nitrogen atom has a lone pair of electrons that can act as donor sites.
- **Conclusion**: Therefore, diethylene triamine has **3 donor sites** (one from each nitrogen).

### Step 4: Analyze EDTA^(4-)
- **Structure**: EDTA^(4-) has multiple donor sites due to its structure, which includes:
- 2 nitrogen atoms (each with a lone pair).
- 4 carboxylate groups (each with a negative charge).
- **Donor Sites**:
- The 2 nitrogen atoms contribute 2 donor sites.
- The 4 carboxylate groups contribute 4 donor sites.
- **Conclusion**: Therefore, EDTA^(4-) has **6 donor sites** (2 from nitrogen and 4 from carboxylate).

### Summary of Donor Sites
- Mercapto: **1 donor site**
- Glycinate: **2 donor sites**
- Diethylene triamine: **3 donor sites**
- EDTA^(4-): **6 donor sites**

### Final Answer
The number of donor sites in mercapto, glycinate, diethylene triamine, and EDTA^(4-) are **1, 2, 3, and 6**, respectively.