The oxidation and coordination numbers of cobalt in the compound [Co(NH₃)₅Cl]Cl₂ are, respectively A)2 and 6. B)2 and 8. C)3 and 6. D)3 and 8. E)None of these choices are correct.

Question

Quizplus · Accepted Answer

The compound given is [Co(NH3)5Cl]Cl2. In this complex, cobalt is bonded to five ammonia (NH3) ligands and one chloride (Cl) ligand, making the coordination number 6. The overall charge of the complex is +2 (since it is balanced by two Cl- ions outside the coordination sphere), indicating that cobalt is in the +3 oxidation state.

The Oxidation and Coordination Numbers of Cobalt in the Compound