Question:
The correct structure of the complex having IUPAC name sodium hexanitrocobaltate(III) is:
The correct structure of the complex having IUPAC name sodium hexanitrocobaltate(III) is:
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For complex salts, the number of counterions must balance the charge of the coordination complex.
Updated On: Mar 4, 2025
- \( Na_3 [Co(NO_2)_5] \)
- \( Na_4 [Co(NO_2)_6] \)
- \( Na_3 [Co(NO_2)_6] \)
\( Na_4 [Co(NO_2)_5] \)
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The Correct Option is C
Solution and Explanation
The given IUPAC name is sodium hexanitrocobaltate(III).
- "Hexanitro-" refers to six \( NO_2 \) ligands.
- "Cobaltate" indicates the presence of a complex anion.
- The oxidation state of cobalt is (III), meaning \( Co^{3+} \).
- The charge of \( [Co(NO_2)_6]^{3-} \) requires three \( Na^+ \) ions for charge neutrality.
Thus, the correct formula is \( Na_3 [Co(NO_2)_6] \), making the correct answer (c).
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