Coordination CompoundHard

Question

Which of the following complex involves d2sp3 hybridisation ?

Options

A.[Co(H2O)6]3+
B.[CoF6]3-
C.[Mn(H2O)6]2+
D.[Fe(H2O)6]3+

Solution

H2O is weak field ligand but Co3+ with 3d6 configuration has greater CFSE and thus [Co(H2O)6]3+ is inner orbital complex and is diamagnetic.

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