Multiple choice

Which of the following is/are outer orbital complex(es)?

  1. [Co(NH3)6]3+ 2. [Fe(CN)6]3-
  2. ([FeF6]3–)

  1. 1 only

  2. 2 only

  3. 3 only

  4. 2 and 3 only

  5. All of the above

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

[FeF6]3– has an octahedral shape. F is a weak-field ligand. The d electron configuration for Fe3+ is d5. The splitting energy is small. Inner d orbitals will take part in hybridisation (sp3d2 hybridisation). Therefore, [FeF6]3– is outer orbital complex.