Coordination Compounds

Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?

  1. The complex is paramagnetic.
  2. The complex gives white precipitate with silver nitrate solution.
  3. The complex is an outer orbital complex.
  4. The complex involves d2sp3 hybridisation and is octahedral in shape.

Answer

In case of d3 configuration, the number of unpaired electrons remains 3 whether the ligand is strong field or weak field.

The hybridisation scheme can be shown as:

 

Hence, the complex is inner orbital complex as it involves (n-1)d orbitals for hybridisation.

3.93 = √(n(n+2))

So, n =3 (here n is number of unpaired electrons)

The correct option is C.