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  • Need clarity, kindly explain! The octahedral complex of a metal ion M3+ with four monodentate ligands L1 ,L2 ,L3 and L4 absorb wave lengths in the region of red ,green, yellow ,and blue ,respectively. The incressing order of ligand strength of the fo

 The octahedral complex of a metal ion   M3+ with four monodentate ligands L1 ,L2 ,L3 and L4 absorb wave lengths  in the region of red ,green, yellow ,and blue ,respectively. The incressing order of ligand strength of the four ligends is:

  • Option 1)

    L_{4}< L_{3 }< L_{2}< L_{1 }

  • Option 2)

    L_{1}< L_{3 }< L_{2}< L_{4 }

  • Option 3)

    L_{3}< L_{2}< L_{4}< L_{1 }

  • Option 4)

    L_{1}< L_{2 }< L_{4}< L_{3 }

 

Answers (1)

best_answer

As we learned

 

Colour in coordination compounds -

The colour of the complex is complimentary to that which is absorbed

-

 

 Colours in order of increasing wavelength :

Violet< Indigo< Blue< Green< Yellow< Orange< Red

As we know, CFSE\propto \frac{1}{\lambda (wavelength)}

also, CFSE\propto Fields\: strength\: of\: ligards

So, increasing order of ligands strength of the four ligands is :

L_{1}<L_{3}< L_{2}<L_{4}

 


Option 1)

L_{4}< L_{3 }< L_{2}< L_{1 }

Option 2)

L_{1}< L_{3 }< L_{2}< L_{4 }

Option 3)

L_{3}< L_{2}< L_{4}< L_{1 }

Option 4)

L_{1}< L_{2 }< L_{4}< L_{3 }

Posted by

prateek

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