The total crystal field stabilization energy (CFSE) for the complexes `[Co(H_(2)O)_(6)]^(3+)` and `[CoF_(6)]^(3-)` are respectively : (P is the pairing energy)

Options

A. `-24dq+2P" and "-24dq+2P`
B. `-24dq+2P" and "-4.0dq`
C. `-4.0dq" and "-4.0dq`
D. `4.0dq" and "0`

Answer

B

Explanation

`[Co(H_(2)O)_(6)]^(3+),d^(6)" "," "[CoF_(6)]^(3-),d^(6)`
`t_(2g)^(2,2,2),eg^(0,0)" "," "t_(2g)^(2,1,1),eg^(1,1)`
`CFSE=-2.4Delta_(0)+2P" "," "CFSE=-1.6Delta_(0)+1.2Delta_(0)`
`Delta_(0)=10" "dq" "," "=-4" "dq`