JEE Main & Advanced Chemistry Coordination Chemistry Question Bank Critical Thinking Coordination

  • question_answer
    Which one of the following complexes is an outer orbital complex [AIEEE 2004]

    A) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    B) \[{{[Mn{{(CN)}_{6}}]}^{4-}}\]

    C) \[{{[Fe{{(CN)}_{6}}]}^{4-}}\]

    D) \[{{[Ni{{(N{{H}_{3}})}_{6}}]}^{2+}}\] Atomic nos: \[Mn=25,\,Fe=26,\,Co=27,\,Ni=28\]

    Correct Answer: D

    Solution :

    Complex ion Hybridization of central atom \[{{[Fe{{(CN)}_{6}}]}^{4-}}\] \[{{d}^{2}}s{{p}^{3}}\] (inner) \[{{[Mn{{(CN)}_{6}}]}^{4-}}\] \[{{d}^{2}}s{{p}^{3}}\] (inner) \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\] \[{{d}^{2}}s{{p}^{3}}\] (inner) \[{{[Ni{{(N{{H}_{3}})}_{6}}]}^{2+}}\] \[s{{p}^{3}}{{d}^{2}}\] (outer)


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