First slide

Aplicaitons of VBT

Question

The reaction ${[Fe {(CNS)}_{6}]}^{3 -} \to {[{FeF}_{6}]}^{3 -}$ takes place with:

Moderate

A

decrease in magnetic moment
B

increase in coordination number
C

decrease in coordination number
D

increase in magnetic moment

Solution

[Fe(CNS)₆]^3- is inner-orbital complex with one electron unpaired while [FeF₆]^3- is outer-orbital complex with five unpaired electrons.

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