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Co^(2+)(aq)+SCN^(-)(aq) to "complex" (X)...

`Co^(2+)(aq)+SCN^(-)(aq) to "complex" (X)`.
`Ni^(2+)(aq)+"Dimethylglyoxime" overset(NH_(4)OH) to "Complex" (Y)`.
The coordination number of cobalt and nickel in complexes X and Y are four.
The geometry of complexes (X) and (Y) are respectively :

A

tetrahedral and sqaure planar.

B

both tetrahedral.

C

square planer and tetrahedral

D

both square planer.

Text Solution

Verified by Experts

(A),`X=[Co(SCN)_(4)]^(2-)`,
cobalt is in +2 oxidation state and `SCN^(-)` is weak field ligand . So, `[Co(SCN)_(4)]^(2-):`

`[Ni(dmg)_(2)]`: Nickel is in +2 oxidation state and dmg is chelating ligand. So,
`[Ni(dmg)_(2)]`:
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