Question:
Which of the following complexes will show coordination isomerism?}
(A) \( [\text{Ag}(\text{NH}_3)_2][\text{Ag}(\text{CN})_2] \)
(B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \)
(C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \)
Choose the correct answer from the options given below:
Which of the following complexes will show coordination isomerism?}
(A) \( [\text{Ag}(\text{NH}_3)_2][\text{Ag}(\text{CN})_2] \)
(B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \)
(C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \) Choose the correct answer from the options given below:
(B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \)
(C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \)
(E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \) Choose the correct answer from the options given below:
Updated On: Apr 10, 2026
- B, C and D Only
- B, D and E Only
- A, C and D Only
- C, D and E Only
Show Solution
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The Correct Option is B
Solution and Explanation
Coordination isomerism occurs when there is a difference in the way the ligands are attached to the central metal atom/ion. In coordination compounds, isomerism can be caused by different ligand arrangements, leading to variations in the properties of the complex.
Let's analyze each complex:
- (A) \( [\text{Ag}(\text{NH}_3)_2][\text{Ag}(\text{CN})_2] \): This complex cannot show coordination isomerism because both the silver ions are coordinated with the same ligands. Therefore, no isomerism is possible.
- (B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \): This complex will show coordination isomerism. The central metal ions \( \text{Co}^{3+} \) and \( \text{Cr}^{3+} \) have different ligands, so the complex can have different combinations of ligands attached to the two metal ions.
- (C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \): This complex will show coordination isomerism. The two \( \text{Co}^{3+} \) ions can have different ligands attached to them, and thus isomerism is possible.
- (D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \): This complex will show coordination isomerism. The \( \text{Fe}^{3+} \) and \( \text{Co}^{3+} \) ions have different ligands, which can lead to coordination isomerism.
- (E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \): This complex will show coordination isomerism because there are two different metal ions (\( \text{Co}^{3+} \) and \( \text{Fe}^{3+} \)) with different ligands attached to them.
Thus, the complexes that show coordination isomerism are (B), (D), and (E).
Final Answer: B, D and E Only
- (B) \( [\text{Co}(\text{NH}_3)_6][\text{Cr}(\text{CN})_6] \): This complex will show coordination isomerism. The central metal ions \( \text{Co}^{3+} \) and \( \text{Cr}^{3+} \) have different ligands, so the complex can have different combinations of ligands attached to the two metal ions.
- (C) \( [\text{Co}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \): This complex will show coordination isomerism. The two \( \text{Co}^{3+} \) ions can have different ligands attached to them, and thus isomerism is possible.
- (D) \( [\text{Fe}(\text{NH}_3)_6][\text{Co}(\text{CN})_6] \): This complex will show coordination isomerism. The \( \text{Fe}^{3+} \) and \( \text{Co}^{3+} \) ions have different ligands, which can lead to coordination isomerism.
- (E) \( [\text{Co}(\text{NH}_3)_6][\text{Fe}(\text{CN})_6] \): This complex will show coordination isomerism because there are two different metal ions (\( \text{Co}^{3+} \) and \( \text{Fe}^{3+} \)) with different ligands attached to them.
Thus, the complexes that show coordination isomerism are (B), (D), and (E).
Final Answer: B, D and E Only
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