oxidation numbers for ligands

Rylee Nelsen 3A
Posts: 37
Joined: Fri Sep 28, 2018 12:22 am

oxidation numbers for ligands

I am confused as to how you calculate the oxidation number for ligands in a coordinate compound? If someone could give an example that would be greatly appreciated!

Jeffrey Xiao 4A
Posts: 35
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: oxidation numbers for ligands

Well, oxidation number can be calculated from the charges of the ligands and the overall charge of the coordinate compound,
Example: [Fe(NCS)(OH2)5]2+ ,OH2 is neutral so it is not included in the calculations, there is one NCS which is an anionic ligand with -1 charge so this means the iron metal must have a +3 charge to make it so that the entire compound will end up with an overall charge of +2 (3-1=2). I'm assuming you meant the oxidation number for the metal not the ligands since the oxidation number of the ligands is just the charge of the anionic ligand.

Charles Gu 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: oxidation numbers for ligands

In order to find oxidation numbers you have know the oxidation numbers of at least most of the molecule and then match the charge of the molecule.