Multiple choice

Which of the following is/are outer orbital complex?

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

  1. Only 1 and 2

  2. Only 2 and 3

  3. Only 1 and 3

  4. Only 3

  5. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The complex 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, the complex is outer orbital complex.

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