Which of the following has largest number of isomers ?

CHEMISTRY · Single correct · CBSE · Chemistry · Coordination Compounds · Coordination Compounds

Problem

Which of the following has largest number of isomers ? (1)

[\text{Co}(\text{en})_2\text{Cl}_2]^+

(2)

[\text{Co}(\text{NH}_3)_5\text{Cl}]^{2+}

(3)

[\text{Ir}(\text{PR}_3)_2\text{H}(\text{CO})]^{2+}

(4)

[\text{Ru}(\text{NH}_3)_4\text{Cl}_2]^+