Multiple choice

Which of the following will be the decreasing order of Δo values for the given complexes?

  1. [Co(NH3)6]+3
  2. [Rh(NH3)6]+3
  3. [Ir(NH3)6]+3

  1. 1 > 2 > 3

  2. 1 > 3 > 2

  3. 2 > 1 > 3

  4. 3 > 2 > 1

  5. 3 > 1 > 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because the value of Δo for complexes of metals in the same group and having the same oxidation state increases from first to second transition series and second to third transition series. The Δo values for the complexes [Co(NH3)6]+3, [Rh(NH3)6]+3 and [Ir(NH3)6]+3 are 23000 cm-1, 34000 cm-1 and 41000 cm-1, respectively.

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