Question

Which of the following sets of ligands does NOT contain ambident ligand in it?

• A. Oxalate ion, \(\text{NO}_2^-\), \(\text{NCS}^-\)
• B. \(\text{C}_2\text{O}_4^{2-}\), Ethylene diamine, \(\text{H}_2\text{O}\)
• C. \(\text{NO}_2^-\), \(\text{C}_2\text{O}_4^{2-}\), \(\text{EDTA}^{4-}\)
• D. \(\text{EDTA}^{4-}\), \(\text{NCS}^-\), Oxalate ion

Hint:

Ambident ligands include NO2- and NCS-; oxalate, en, water and EDTA are not ambident.

Answer 1

The Correct Option is B

Step 1: List ambident ligands:
$\text{NO}_2^-$, $\text{SCN}^-$/$\text{NCS}^-$, and $\text{CN}^-$ (C or N). Oxalate, en, water and EDTA are not ambident.

Step 2: Scan the sets:
A: has $\text{NO}_2^-$. C: has $\text{NO}_2^-$. D: has $\text{NCS}^-$. B: oxalate, en, $\text{H}_2\text{O}$, none from the list.

Step 3: Pick:
Option B.

Final Answer:
Set B contains oxalate, en and water, none of which is ambident. \[ \boxed{\text{(B) }\text{C}_2\text{O}_4^{2-}\text{, ethylene diamine, H}_2\text{O}} \]