Question:
Which from following coordinate complexes contains neutral ligand ?
Which from following coordinate complexes contains neutral ligand ?
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Look for ligands such as CO, NH3 or H2O that carry no charge.
Updated On: Oct 1, 2026
- Pentacarbonyliron (0)
- Hexacyanoferrate (II) ion
- Trioxalatocobaltate (III) ion
- Sodium hexanitrocobaltate (III)
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understand the concept
A ligand is neutral if it has no net charge. Carbonyl (CO), ammine (\(\text{NH}_3\)) and aqua (\(\text{H}_2\text{O}\)) are common neutral ligands.
Step 2: Check (A)
Pentacarbonyliron(0), \([\text{Fe}(\text{CO})_5]\), has five CO ligands, which are neutral. The oxidation state of iron is 0 and the complex is neutral.
Step 3: Check (B), (C) and (D)
Hexacyanoferrate(II) has six \(\text{CN}^-\) ligands, which are anionic. Trioxalatocobaltate(III) has three \(\text{C}_2\text{O}_4^{2-}\) ligands, also anionic. Sodium hexanitrocobaltate(III) has six \(\text{NO}_2^-\) ligands, again anionic.
Step 4: Conclusion
Only (A) contains a neutral ligand.
Final Answer:
Carbonyl is a neutral ligand. This is option (A). \[ \boxed{\text{(A) }\text{Pentacarbonyliron(0)}} \]
A ligand is neutral if it has no net charge. Carbonyl (CO), ammine (\(\text{NH}_3\)) and aqua (\(\text{H}_2\text{O}\)) are common neutral ligands.
Step 2: Check (A)
Pentacarbonyliron(0), \([\text{Fe}(\text{CO})_5]\), has five CO ligands, which are neutral. The oxidation state of iron is 0 and the complex is neutral.
Step 3: Check (B), (C) and (D)
Hexacyanoferrate(II) has six \(\text{CN}^-\) ligands, which are anionic. Trioxalatocobaltate(III) has three \(\text{C}_2\text{O}_4^{2-}\) ligands, also anionic. Sodium hexanitrocobaltate(III) has six \(\text{NO}_2^-\) ligands, again anionic.
Step 4: Conclusion
Only (A) contains a neutral ligand.
Final Answer:
Carbonyl is a neutral ligand. This is option (A). \[ \boxed{\text{(A) }\text{Pentacarbonyliron(0)}} \]
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