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Question
Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:
[CoF6]3−
Solution
Co(27) = [Ar] 3d74s2
Co3+ = [Ar] 3d64s0
F− being a weak field ligand cannot pair electrons.
Hence, [CoF6]3− is a paramagnetic and octahedral complex.
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