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JIPMER 2011
Exam
JIPMER
Year
2011
Subject
Chemistry
Chapter
Coordination Compounds

JIPMER 2011 · Chemistry · Coordination Compounds

Which one of the following complexes is outer orbital complex?

Which one of the following complexes is outer orbital complex?

Options

  1. A\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}
  2. B[Mn(CN)6]4−\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{4-}
  3. C[Fe(CN)6]4−\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}
  4. D\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}

Correct answer

D. \left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}

Step-by-step solution

Generally weaker field ligands form outer orbital complex. Between [Co(NH3)6]3+and\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+} and\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+},thelaterformouterorbitalcomplexbecauseofits, the later form outer orbital complex because of itsd^8configuration.(Theconfigurationofconfiguration. (The configuration of\mathrm{Co}^{3+}=d^6 )
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