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

• 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.