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Which of the following is not an inner o...

Which of the following is not an inner orbital complex ?

A

`[Mn(CN)_(6)]^(3+)`

B

`[Fe(CN)_(6)]^(3-)`

C

`[Co(H_(2)O)_(6)]^(2+)`

D

`[Co(C_(2)O_(4))_(3)]^(3-)`

Text Solution

Verified by Experts

The correct Answer is:
C
In the formation of an inner orbital complex, the inner d orbital (3d) is used in hybridization. `[Mn(CN)_(6)]^(3-)[Fe(CN)_(6)]^(3-)` and `[Co(C_(2)O_(4))_(3)]^(3-)` are inner orbital complexes involving `d^(2) sp^(3)` hybrization. The first two complexes are paramagnetic corresponding to one unpaired electron while the third one is diamagnetic. Such complexes are unsually formed with strong field ligands `[Co(H_(2)O)_(6)]^(2+)` is an outer orbital complex involving `sp^(3) d^(2)` hybridization. Note that `H_(2)O` is a weak field ligand.
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Knowledge Check

  • Which of the following is not an outer orbital complex ?

    A
    `[MnCI_(6)]^(3-)`
    B
    `[Fe(CN)_(6)]`
    C
    `[FeF_(6)]^(3-)`
    D
    `[CoF_(6)]^(3-)`

  • Which one of the following is an inner orbital complex as well as diamagnetic in nature?

    A
    (a) `[Cr(NH_3)_6]^(3+)`
    B
    (b) `[Co(NH_3)_6]^(3+)`
    C
    (c) `[Ni(NH_3)_6]^(2+)`
    D
    (d) `[Zn(NH_3)_6]^(2+)`

  • Which of the following is an inner orbital complex as well as diamagnetic in behaviour [Atomic numbers Zn = 30, Cr = 24, Co = 27, Ni = 28.]

    A
    `|Zn(NH_(3))_(6)|^(2)`
    B
    `|Ni(NH_(3))_(6)|^(2+)`
    C
    `|Cr(NH_(3))_(6)|^(3+)`
    D
    `|Co(NH_(3))_(6)|^(3+)`

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