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The donor atoms in EDTA are-...

The donor atoms in EDTA are-

A

O-atoms only

B

N-atoms only

C

Two N-atoms and four O-atoms

D

Three N-atoms and three O-atoms

Text Solution

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The correct Answer is:
To determine the donor atoms in EDTA (Ethylene Diamine Tetraacetate), we need to analyze its structure and the atoms that can donate electron pairs to a central metal ion. ### Step-by-Step Solution: 1. **Identify the Structure of EDTA**: - EDTA is composed of an ethylene backbone (CH2-CH2) with two amine groups and four acetate groups (derived from acetic acid). - The full structural formula can be represented as: \[ H_2N-CH_2-CH_2-NH_2 + 4 CH_3COO^- \] - This indicates that there are two nitrogen atoms and four oxygen atoms in the acetate groups. 2. **Locate the Donor Atoms**: - The donor atoms in coordination chemistry are typically those that can donate lone pairs of electrons to a metal ion. - In EDTA, the nitrogen atoms (from the amine groups) each have a lone pair of electrons that can be donated. - Each of the four oxygen atoms (from the acetate groups) also has lone pairs that can be donated. 3. **Count the Donor Atoms**: - There are **2 nitrogen atoms** that can donate electrons. - There are **4 oxygen atoms** (from the acetate groups) that can also donate electrons. - Therefore, the total donor atoms in EDTA are 2 nitrogen atoms and 4 oxygen atoms. 4. **Conclusion**: - The donor atoms in EDTA are **2 nitrogen atoms and 4 oxygen atoms**. ### Final Answer: The donor atoms in EDTA are 2 nitrogen atoms and 4 oxygen atoms. ---
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