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Identify the homoleptic complexes with odd number of electrons in the central metal. (A) [FeO4]2− (B) [Fe(CN)6]3− (C) [Fe(CN)5NO]2− (D) [CoCl4]2− (E) [Co(H2O)3F3] Choose the correct answer from the options given below :

1. (B) and (D) only
2. (C) and (E) only
3. (A), (B) and (D) only
4. (A), (C) and (E) only

Correct answer: (A), (C) and (E) only

Solution

Homoleptic complexes with an odd number of electrons in the central metal are those where the metal center has an unpaired electron. In the given options, [FeO4]2−, [Fe(CN)5NO]2−, and [Co(H2O)3F3] each contain a central metal with an odd number of d-electrons, confirming their classification as homoleptic complexes with odd electron counts.

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