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Question

The complex  Can be formally formed from K subscript 2 end subscript left square bracket P t C l subscript 4 end subscript right square bracket by which one of the following sequences of substitution of the chloride ions?

  1. P y comma B r to the power of minus end exponent comma N H subscript 3 end subscript    
  2. B r to the power of minus end exponent comma P y comma N H subscript 3 end subscript    
  3. B r to the power of minus end exponent comma N H subscript 3 end subscript comma P y    
  4. N H subscript 3 end subscript comma B r to the power of minus end exponent comma P y    

The correct answer is: N H subscript 3 end subscript comma B r to the power of minus end exponent comma P y


    Ligand strength is in order
    P y less than B r to the power of minus end exponent less than N H subscript 3 end subscript
    Thus, replacement of C l to the power of minus end exponent ligands by above ligands is in same order

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