Which of the following has largest number of isomers ? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Conductance measurements indicate two ions per formula unit (a 1:1 electrolyte), which means there is one complex ion and one simple counterion outside the coordination sphere. Step 2: Since the addition of silver nitrate produces a precipitate of AgCl but no AgBr, only the chloride ion is present outside the sphere as a counterion. Step 3: This puts both bromide ions inside the coordination sphere, yielding the structural formula [CoBr2(NH3)4]Cl, which corresponds to option (d).