Coordination CompoundHardBloom L3

Question

Which of the following is not correctly matched?

Complex ion |CFSE|

Options

A.[Co(NH3)6]3+ 24 Dq
B.[Cr(NH3)6]3+ 12 Dq
C.[FeF6]3– 4 Dq
D.[Fe(CN)6]3– 20 Dq

Solution

Sol. [FeF6]–3 ⇒ Fe+3 = 3d5 ⇒ F is W.F.L. ⇒ ∆0 < p

CSFE = 10∆0 × 3× (–0.4) + 10∆0 × 2(0.6)

= 0 Dq

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