Match the following complexes with their CFSE values in octahedral field
( $Δ =$ octahedral crystal field splitting energy and $P =$ pairing energy)

LIST I
LIST II
(P) K₄[Fe(CN)₆]
(1) -0.6Δ_o
(Q) [MnCl₆]^4-
(2) -2.4Δ_o + 2P
(R) [Ni(H₂O)₆]SO₄
(3) Zero
(S) [Cr(H₂O)₆]₂₊
(4) -1.2Δ_o

Question

Match the following complexes with their CFSE values in octahedral field

( $Δ =$ octahedral crystal field splitting energy and $P =$ pairing energy)

LIST I	LIST II
(P) K₄[Fe(CN)₆]	(1) -0.6Δ_o
(Q) [MnCl₆]^4-	(2) -2.4Δ_o + 2P
(R) [Ni(H₂O)₆]SO₄	(3) Zero
(S) [Cr(H₂O)₆]₂₊	(4) -1.2Δ_o

TestHub · Accepted Answer

CFSE = [ − 0.4 ( n t 2 g ​ ​ ) + 0.6 ( n e g ​ ​ )] Δ o ​ + n P Strong Field Ligands (SFL): Cause pairing (Low Spin complexes). Examples: C N − , CO . Weak Field Ligands (WFL): Do not cause pairing (High Spin complexes). Examples: C l − , H 2 ​ O .

Chemistry - Coordination Chemistry Question with Solution | TestHub

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