Low spin complex of `d^6`-cation in an octahedral field will have the following energy:

Options

A. `-2//5 Delta_(0) + P`
B. `-12//5 Delta_(0) + P`
C. `-12//5 Delta_(0) + 3P`
D. `-2//5 Delta_(0) + 2P`

Answer

C

Explanation

Low spin complexes are formed with strong field ligands.

The total crystal field stabilization energy is given by
`(CFSE)_("Ocatahedral") =[-(2)/(5)n_((t_(2g))) + (3)/(5)n_((e_(g)))]Delta_(o)`
`= - (12)/(5)Delta_(o)`
If P is the electron pairing energy per electron, pair then net energy will be `- (12)/(5)Delta_(o) + 3p`