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Which of the following complexes is homoleptic?

(i) \left [ Co\left ( NH_{3} \right )_{6} \right ]^{3+}

(ii) \left [ Co\left ( NH_{3} \right )_{4}Cl_{2} \right ]^{+}

(iii) \left [ Ni\left ( CN \right )_{4} \right ]^{2-}

(iv) \left [ Ni\left ( NH_{3} \right )_{4}Cl_{2} \right ]

Answers (1)

Option (i) and (iii) are the correct answers.

Explanation: Both \text {Co and Ni} are attached the same kind of ligands in the complexes \left [ Co\left ( NH_{3} \right )_{6} \right ]^{3+} and \left [ Ni\left ( CN \right )_{4} \right ]^{2-}. Hence they are homoleptic.

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