Coordination and Oxidation Number of the Metal:
Coordination:
- The complex [Co(NH3)5Cl]ClO4 has a coordination number of 6. This means that the cobalt ion is surrounded by six ligands.
- The ligands in this complex are ammonia (NH3) and chloride ions (Cl-). There are 5 ammonia ligands and 1 chloride ligand coordinated to the cobalt ion.
Oxidation Number:
- The oxidation number of the metal in the complex can be calculated as follows:
- The oxidation number of ammonia ligands is 0.
- The oxidation number of chloride ligand is -1.
- The overall charge of the complex is 1+ (ClO4- has a charge of -1 and there is one ClO4- ion in the complex).
- Therefore, the oxidation number of cobalt in the complex is +3.
Explanation:
- The oxidation number of cobalt in this complex is determined by balancing the charges of the ligands and the overall charge of the complex. Since the complex has a 1+ charge, the cobalt ion must have a +3 oxidation number to balance out the negative charges of the ligands.
- The coordination number of 6 indicates that the cobalt ion is surrounded by 6 ligands, which in this case are ammonia and chloride ions. The coordination number of 6 is common for cobalt complexes due to its d8 electron configuration, which allows for the formation of coordination compounds with a coordination number of 6.