[CoCl4(NH3)2]^- in this compound state oxidation number and coordination number
In the compound [CoCl4(NH3)2]^-, the oxidation number of Co (cobalt) is +3.
The coordination number of Co is 6. This means that the Co atom is coordinated with six ligands: four chloride ions (Cl^-) and two ammonia molecules (NH3).
[Pt(en)2Cl2]^2+ state coordination number and oxidation number
In the compound [Pt(en)2Cl2]^2+, the coordination number of the Pt (platinum) atom is 6. This means that the Pt atom is coordinated with six ligands: two ethylenediamine molecules (en) and four chloride ions (Cl^-).
The oxidation number of Pt is +2.
In the compound [CoCl4(NH3)2]^-, the coordination number and oxidation number can be determined as follows:
Coordination Number:
The coordination number represents the number of ligands attached to the central metal ion. In this compound, [CoCl4(NH3)2]^-, cobalt (Co) is the central metal ion. By counting the number of ligands attached to the cobalt ion, we can determine the coordination number. In this case, there are 4 chloride (Cl) ligands and 2 ammonia (NH3) ligands attached to the cobalt ion. Therefore, the coordination number is 6.
Oxidation Number:
The oxidation number is the charge assigned to the central metal ion when all ligands are removed along with their associated electrons. In this compound, the cobalt ion has a negative charge of -, indicated by the superscript - at the end. This means that it gained one extra electron or has a -1 charge. To determine the oxidation number, the overall charge of the compound is usually assigned to the central metal ion. Hence, the oxidation number of cobalt (Co) in [CoCl4(NH3)2]^- is +3.