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What is the number of unpaired electrons in [Fe(H2O)6]^2+ if it is known to be a high spin complex?

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in Chemistry – Class 12 by (188k points)
What is the number of unpaired electrons in [Fe(H2O)6]^2+ if it is known to be a high spin complex?

(a) 0

(b) 2

(c) 3

(d) 4

I got this question during an interview.

Origin of the question is Bonding in Coordination Compounds topic in division Coordination Compounds of Chemistry – Class 12

1 Answer

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Best answer
Correct choice is (d) 4

The explanation: The configuration of Fe^2+ is 3d^6. The complex has a CN=6 has should have sp^3d^2 hybridisation. This leaves the 3d orbitals as it is with 4 unpaired electrons.

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