SATHEE: Coordination Compounds 2 Question 9

Coordination Compounds 2 Question 9

####10. The correct order of the spin only magnetic moment of metal ions in the following low spin complexes, ${[V (C N)_{6}]}^{4 -}$ , ${[F e (C N)_{6}]}^{4 -}, {[R u {(N H_{3})}_{6}]}^{3 +}$ , and ${[C r {(N H_{3})}_{6}]}^{2 +}$ , is

(a) $C r^{2 +} > R u^{3 +} > F e^{2 +} > V^{2 +}$

(2019 Main, 8 April I)

(b) $V^{2 +} > C r^{2 +} > R u^{3 +} > F e^{2 +}$

(d) $C r^{2 +} > V^{2 +} > R u^{3 +} > F e^{2 +}$

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Solution:

Key Idea In presence of strong field ligands, $Δ_{0} > p$ , for fourth electron it is more energetically favourable to occupy $t_{2 g}$ orbital with configuration $t_{2 g}^{4} e_{g}^{0}$ and form low spin complexes.

The correct order of the spin only magnetic moment of metal ions in the given low-spin complexes is $V^{2 +} > C r^{2 +} > R u^{3 +} > F e^{2 +}$ . All the given complexes possess strong field ligands $(C N, N H_{3})$ . Hence, readily form low spin complexes.

Coordination Compounds 2 Question 9

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Coordination Compounds 2 Question 9

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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