JEE MAIN - Chemistry (2023 - 24th January Evening Shift - No. 10)
The hybridization and magnetic behaviour of cobalt ion in $$\mathrm{[Co(NH_3)_6]^{3+}}$$ complex, respectively is :
$$\mathrm{sp^3d^2}$$ and paramagnetic
$$\mathrm{sp^3d^2}$$ and diamagnetic
$$\mathrm{d^2sp^3}$$ and diamagnetic
$$\mathrm{d^2sp^3}$$ and paramagnetic
Explanation
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ is diamagnetic with $\mathrm{d}^{2} \mathrm{sp}^{3}$ hybridisation of $\mathrm{Co}^{+3}$.
This is because $\mathrm{NH}_{3}$ is a strong field ligand and forces electrons to pair up in a $\mathrm{d}^{6}$ configuration.
This is because $\mathrm{NH}_{3}$ is a strong field ligand and forces electrons to pair up in a $\mathrm{d}^{6}$ configuration.
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