SATHEE: Coordination Compounds 2 Question 19

Coordination Compounds 2 Question 19

####21. Homoleptic octahedral complexes of a metal ion ’ $M^{3 +}$ , with three monodentate ligands $L_{1}, L_{2}$ and $L_{3}$ absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is

(2019 Main, 9 Jan II)

(a) $L_{1} < L_{2} < L_{3}$

(b) $L_{2} < L_{1} < L_{3}$

(d) $L_{3} < L_{2} < L_{1}$

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Answer:

Correct Answer: 21. (b)

Solution:

In homoleptic complexes, the metal atom/ion is linked to only one type of ligand. Assuming, ligands are neutral, the octahedral complexes of $M^{3 +}$ can be,

$\begin{array}{lccc} {[M {(L_{1})}_{6}]}^{3 +}, {[M {(L_{2})}_{6}]}^{3 +} & and & {[M {(L_{3})}_{6}]}^{3 +} λ_{Absorption}^{(I)} & (II) & (III) Soeen & Blue & Red (wavelength) λ_{III}^{L_{3}} > λ_{I}^{L_{1}} > λ_{II}^{L_{2}} \end{array}$

We know, ligand strength $\propto Δ_{absorption}^{\circ}$

So, the increasing order of the ligand strength will be, $L_{3} < L_{1} < L_{2}$

Coordination Compounds 2 Question 19

Answer:

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Coordination Compounds 2 Question 19

Answer:

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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