According to CFT for d6 configuration in an octahedral complex, the correct possible electronic configurations for complex with strong field ligands and with weak field ligands respectively will be
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a
t2g4eg2 ; t2g6
b
t2g6 ; t2g4eg2
c
t2g2eg4 ; t2g3eg3
d
t2g3eg3 ; t2g2eg4
answer is B.
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Detailed Solution
In octahedral complexes, energy of t2g P,strong field ligand, Pairing occurs in lower level until it is completely – t2g6Δo < P,weak field ligand, Pairing occurs only when both t2g and eg set of orbitals are half filled…… t2g4eg2