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The correct order for the CFSE (numerica...

The correct order for the CFSE (numerical value ) for the following complexes is :
`{:("Complex",P,Q,R,S),("Formula",[CoF_(6)]^(3-),[Co(CN)_(6)]^(3-),[Co(NH_(3))_(6)]^(3+),[Co(H_(2)O)_(6)]^(3+)):}`

A

`P gt Q gt R gt S`

B

`Q gt R gt S gt P`

C

`S gt R gt P gt Q`

D

` R gt Q gt P gt S`

Text Solution

Verified by Experts

The correct Answer is:
B
CFSE depends on the relative magnitude of crystal field splitting, `Delta_(o)` and pairing energy, p and in turns `Delta_(o)` depends upon the field produced by ligand and charge on the metal ion. So, the other of increasing crystal field strength is `F^(-)lt H_(2)OltNH_(3) lt CN^(-)`. (Co is in `+3` oxidation state in all complexes) . Thus the (B) option is correct.
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RESONANCE ENGLISH-COORDINATION COMPOUNDS-Miscellneous Solved Problem (MSPS)
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  13. Which of the following statement is not correct ? (a) [Ni(H(2)O)(6)...

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  14. Statement-1: [Co^(II)(NH)(3))(6)]^(2+) is not readily oxidized to [Co^...

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  15. Which of the following is true about the complex [PtCl(2)(NH(3))(OH(2...

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