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Can someone explain The CFSE for octahedral [ CoCl6]4-is 18,000 cm -1. The CFSE for tetrahedral [CoCl4]2- will be

The CFSE for octahedral [ CoCl6]4- is 18,000 cm -1. The CFSE for tetrahedral [CoCl4]2- will be

  • Option 1)

    18,000 cm -1

  • Option 2)

    16,000 cm -1

  • Option 3)

    8,000 cm -1

  • Option 4)

    20, 000 cm-1

 
Answers (1)
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As we learnt in 

Comparison in delta o and delta t -

\bigtriangleup t = \frac{4}{9}\bigtriangleup \circ

-

 

 \Delta {t}=\frac{4}{9} \Delta _{0}

\Rightarrow \Delta {t}=\frac{4}{9} \times 18000\: \: cm^{-1}

= 8000 \: \: cm^{-1}
 


Option 1)

18,000 cm -1


This option is incorrect 

Option 2)

16,000 cm -1

This option is incorrect 

Option 3)

8,000 cm -1

This option is correct 

Option 4)

20, 000 cm-1

This option is incorrect 

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