IGNOU BCHCT 137 2026 - Explain why Co(III)–NO2 (nitro) complexes slowly

Question

Explain why Co(III)–NO₂ (nitro) complexes slowly convert into Co(III)–ONO (nitrito) complexes or vice versa.

10 Jan 2026

Answer :

Word Count : 247

The slow conversion between Co(III)–NO2 (nitro) and Co(III)–ONO (nitrito) complexes can be understood by considering the principles of coordination chemistry, states of matter, and chemical kinetics. In coordination chemistry, Co(III) forms octahedral complexes with ligands like nitro (–NO2) and nitrito (–ONO), which are linkage isomers. These isomers differ in the atom of the ligand bonded to the metal: in the nitro form, nitrogen coordinates to cobalt, whereas in the

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