oxidation number

[Annabella_Amato_1I]

When naming coordination compounds, how do you know what the oxidation number of the central metal ion is?

[claire ikemiya_2I]

To find oxidation number you have to look at the overall charge of the compound, charges of the compounds inside of the coordination sphere, and make a formula. For example [Co(CN)5(0H2)]2-, CN has an overall charge of (-1) and (OH2) is neutral so you’d make the equation


X+5(-1)+0=-2

And solve for x, so combats oxidation number is 3+.

[Norah Gidanian 3D]

You would have to look at the charge of each of the ligands. Then once you figure that out you look at how many there are and then if there is a net charge on the compound you must use the charge of the ligands to figure out what the charge of the metal should be in order to equal that net charge. If there is no charge on the complex then you just make the net charge equal zero.

[Annabella_Amato_1I]

how can you tell what the charge of the ligands are?

[Jacquelyn Challis 2B]

Thank you for this! How would I find the charge of the ligand as well?

[Arnav Saud 2C]

Generally, you want to first look at the overall negative charge of the structure, because that is what the all the charges of all the molecules should add up to. Then identify what all the negative charged molecules, and the remaining charge will be the plus on the central molecule.

[Isaias Gomez D3A]

the overall charge minus any known charges should give you oxidation number.

[Brian Nguyen 2I]

To find the oxidation number, I just take the overall charge of the compound and then take into account the charges of other elements or compounds within the cation to find the charge of the metal ion.

[America Ramirez 3H]

I think to find the charge of the ligands you'd have to memorize from the chart. I don't know if there's a better way but that's what I did.

[405716590]

Thank you this was all helpful!