Coordination CompoundHard
Question
Which of the following is a high spin complex ?
Options
A.[Co(NH3)6]3+
B.[Fe(CN)6]4-
C.[Ni(CN)4]2-
D.[FeF6]3-
Solution
The complex [FeF6]4- is paramagnetic and uses outer orbital (4d) in hybridisation (sp3d2) ; it is thus called as outer orbital or high spin or spin free complex. So :
Fe2+, [Ar]3d6
[FeF6]4-
sp3d2 hybrid orbitals
Six pairs of electrons from six F- ions.
Fe2+, [Ar]3d6
[FeF6]4-
sp3d2 hybrid orbitals
Six pairs of electrons from six F- ions.
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