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JEE Main202313 Apr 2023Evening ShiftChemistryCoordination CompoundsActual

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

Options

  1. A[ Ni ( H 2 O ) 6 ]   2 +
  2. B  [ Co ( en ) 3 ]   3 +
  3. C[ Zn ( H 2 O ) 6 ]   2 +
  4. D[ Co ( H 2 O ) 6 ]   2 +

Correct answer

D. [ Co ( H 2 O ) 6 ]   2 +

Step-by-step solution

Complex having maximum number of unpaired electrons will exhibit maximum attraction to applied magnetic field. Zn H 2 O 6 2 +   → d 10   system ,   t 6 2 g   eg 4 ,   0   unpaired electrons Co H 2 O 6 2 + → d 7   system ,   t 5 2 g   eg 2 ,   3 unpaired electrons Co ( en ) 3 3 + → d 6   system ,   t 6 2 g   eg 0 ,   0   unpaired electrons   Ni H 2 O 6 2 + → d 8   system ,   t 6 2 g   eg 2 ,  

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