Hydrogen and its compoundHard
Question
The complex ion which has no ′d′ - electrons in the central metal atom is :
Options
A.[MnO4]3-
B.[CO(NH3)6]3+
C.[Fe(CN)6]3-
D.[Cr(H2O)6]3-
Solution
The oxidation states and E. C. of metal atom present in these complexes are as given below :
No. of d-electron
MnO4- : Mn (VII) : [Ar]3d0, 4s0 0
[CO(NH3)6]3+ : CO(III) : [Ar]3d6, 4s0 4
[Fe(CN)6]3- : Fe (III) : [Ar]3d5, 4s0 5
[Cr(H2O)6]3- : Cr (III) : [Ar]3d3, 4s0 3
No. of d-electron
MnO4- : Mn (VII) : [Ar]3d0, 4s0 0
[CO(NH3)6]3+ : CO(III) : [Ar]3d6, 4s0 4
[Fe(CN)6]3- : Fe (III) : [Ar]3d5, 4s0 5
[Cr(H2O)6]3- : Cr (III) : [Ar]3d3, 4s0 3
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