The co-ordination complex ions [Co(NH3)5(NO2)]2⊕ and [Co(NH3)5(ONO)]2⊕ are _____ of each other.

Q.1 (vii) The co-ordination complex ions [Co(NH₃)₅(NO₂)]^2⊕ and [Co(NH₃)₅(ONO)]^2⊕ are _____ of each other.

A. ionization isomers

B. solvate isomers

C. linkage isomers

D. co-ordination isomers

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Answer: C. linkage isomers

Answer: (c) linkage isomers

NO₂⁻ is an ambidentate ligand. In the first ion it binds to cobalt through nitrogen (nitro, –NO₂), in the second through oxygen (nitrito, –ONO). Isomers that differ only in the donor atom of an ambidentate ligand are linkage isomers.

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The co-ordination complex ions [Co(NH3)5(NO2)]2⊕ and [Co(NH3)5(ONO)]2⊕ are _____ of each other.

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