The complex $[Co(NH_3)_4(NO_2)_2]Cl$ will show.........
(A) Linkage isomerism
(B) lonization isomerism
(C) Coordination isomerism
(D) Geometrical isomerism
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A), (B) and (D) only
Why (brief):
- (A) Linkage isomerism: NO₂ can bind through N (nitro) or O (nitrito) → linkage isomers.
- (B) Ionization isomerism: a coordinated NO₂⁻ can swap with the counter Cl⁻ to give an ionization isomer (e.g. $[Co(NH_3)_4(NO_2)Cl]NO_2$).
- (D) Geometrical isomerism: in an octahedral $[Co(NH_3)_4(NO_2)_2]^+$ the two identical NO₂ ligands can be cis or trans.
(C) Coordination isomerism does not apply (requires more than one metal center / both cationic and anionic complex parts).