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A metal ions (M^(n+)) forms octahedral [...

A metal ions `(M^(n+))` forms octahedral `[ML_(6)]^(n+)` and tetrahedral `[ML_(4)]^(n+)` complexes with same ligand at different experimental conditions. The `Delta_(o) " of "[ML_(6)]^(n+)` is 3 eV. What is the energy in eV of `e_(g)` orbital of `[ML_(4)]^(n+)` complex?

A

`4/5`

B

`-4/5`

C

`8/15`

D

`-8/15`

Text Solution

Verified by Experts

The correct Answer is:
B
The energy of tetrahedral `[ML_(4)]^(n+)` complex.
Value of tetrahedral complex `Delta_(t)=4/9Delta_(o)`
So, `" "Delta_(t)=4/9 times (3)`
`" "=4/3eV`
For tetrahedral complexes,

The value of crystal field stabilisation energy (E) is either negative or zero, never be positive.
So, `" "E=(-0.6) times 4/3 =-4/5eV`
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