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JEE Main202324 Jan 2023Evening ShiftChemistryCoordination CompoundsActual

The hybridization and magnetic behaviour of cobalt ion in [ Co ( NH 3 ) 6 ] 3 + complex, respectively is

Options

  1. Asp 3 d 2 and diamagnetic
  2. Bd 2 sp 3 and paramagnetic
  3. Cd 2 sp 3 and diamagnetic
  4. Dsp 3 d 2 and paramagnetic

Correct answer

C. d 2 sp 3 and diamagnetic

Step-by-step solution

In [ Co ( NH 3 ) 6 ] 3 + , Co is in + 3 oxidation state with the configuration 3 d 6 . In the presence of NH 3 a strong field ligand, the 3d electrons undergo pairing and leaving two d-orbitals empty. Hence, the hybridisation is d 2 sp 3 which forms an inner orbital octahedral complex. The complex is diamagnetic as it has no unpaired electrons. So, the correct option is C

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