1.

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)

Answer»

`-24dq+2P" and "-24dq+2P`
`-24dq+2P" and "-4.0dq`
`-4.0dq" and "-4.0dq`
`4.0dq" and "0`

Solution :`[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`


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