Consider the coordination compound, \([\mathrm{Co(NH_3)_6}]\mathrm{Cl_3}\). In the formation of this complex, the species which acts as the Lewis acid is:
Show Hint
- \([\mathrm{Co(NH_3)_6}]^{3+}\)
- \(\mathrm{Cl^-}\)
- \(\mathrm{Co^{3+}}\)
- \(\mathrm{NH_3}\)
The Correct Option is C
Solution and Explanation
The central metal ion \(\mathrm{Co^{3+}}\) has vacant d, s and p orbitals and accepts these electron pairs, so it is the Lewis acid.
\([\mathrm{Co(NH_3)_6}]^{3+}\) is the product (complex ion) and \(\mathrm{Cl^-}\) is only the counter ion.
Answer: (3) \(\mathrm{Co^{3+}}\)
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