The hybridization and magnetic behaviour of cobalt ion in [ Co ( NH...

The hybridization and magnetic behaviour of cobalt ion in

[ Co ( {NH}_{3}{)}_{6}{]}^{3 +}

complex, respectively is The hybridization and magnetic behaviour of cobalt ion in [ Co ( NH _ 3 ) _ 6 ] ^ 3 + complex, respectively is

Options

A ${sp}^{3}{d}^{2}$ and diamagnetic
B ${d}^{2}{sp}^{3}$ and paramagnetic
C ${d}^{2}{sp}^{3}$ and diamagnetic
D ${sp}^{3}{d}^{2}$ and paramagnetic

Correct answer

C. ${d}^{2}{sp}^{3}$ and diamagnetic

Step-by-step solution

In $[ Co ( {NH}_{3}{)}_{6}{]}^{3 +}$ , $Co$ is in $+ 3$ oxidation state with the configuration $3{d}^{6}$ . In the presence of ${NH}_{3}$ a strong field ligand, the 3d electrons undergo pairing and leaving two d-orbitals empty. Hence, the hybridisation is ${d}^{2}{sp}^{3}$ which forms an inner orbital octahedral complex. The complex is diamagnetic as it has no unpaired electrons.

The hybridization and magnetic behaviour of cobalt ion in [ Co ( NH _ 3 ) _ 6 ] ^ 3 + complex, respectively is

So, the correct option is C

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