Chemistry - Coordination Chemistry Question with Solution | TestHub

(A) $[Co(N{H}_3{)}_5(N{O}_3){]}^{2+}$

Here NO₃⁻ is generally treated as a monodentate O-bonded ligand in this context; linkage isomerism is usually discussed with ligands like NO₂⁻, SCN⁻, etc. Hence not taken as isomeric.

(B) $[Pt(N{H}_3{)}_4][PtC{l}_4]$

Shows coordination isomerism by exchange of ligands between the complex cation and anion.

(C) $[Pt(en{)}_2][PtC{l}_4]$

Does not show geometrical/optical or coordination isomerism.

(D) $[Co(en{)}_2(H_{2}O)Br{]}^{2+}$

Octahedral $[M(AA{)}_{2}BC]$ type; shows geometrical (cis–trans) and optical isomerism.

Answer = B and D