Select incorrect statement about complex [Cr(NO2)(NH3)5][Zn(SCN)4] : — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Evaluate pair (i): [Co(NH3)5(NO2)]Cl2 and [Co(NH3)5(ONO)]Cl2 differ in the donor atom of the ambidentate nitrite ligand (N vs O), which is correct for linkage isomerism. Step 2: Evaluate pair (ii): [Cu(NH3)4][PtCl4] and [Pt(NH3)4][CuCl4] represent an exchange of ligands between complex cation and complex anion, which is correct for coordination isomerism. Evaluate pair (iii): [Pt(NH3)4]Br2 and [Pt(NH3)4]Cl2 have different molecular formulas, so they are not isomers at all. Step 3: Since only (i) and (ii) are correctly matched, the answer corresponds to option (d).