Roman Numeral
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 65
- Joined: Thu Sep 26, 2019 12:19 am
Roman Numeral
I see roman numerals in a lot of the coordination compounds, and I don't know what it represents. So my question is what do the roman numerals represent or mean?
-
- Posts: 123
- Joined: Fri Sep 20, 2019 12:17 am
- Been upvoted: 1 time
Re: Roman Numeral
It represents the positive charge on a cation. For example a copper (ii) sulfate CuSO4, represents a Cu^2+ ion which attaches itself to the sulfate anion (SO4^2-)
-
- Posts: 63
- Joined: Sat Aug 17, 2019 12:15 am
Re: Roman Numeral
If we use the roman numeral for positive cations what do we use if the transition metal has a negative anion charge? will this happen?
-
- Posts: 102
- Joined: Wed Sep 18, 2019 12:21 am
Re: Roman Numeral
I have personally not seen an instance where the transition metal has a negative anion charge if the charge is designated by a parentheses. If I see a roman numeral, I assume it's "plus whatever that charge is" and it works for me.
-
- Posts: 115
- Joined: Thu Jul 11, 2019 12:15 am
Re: Roman Numeral
As many have said above, it represents the (usually positive) charge of the atom it's coupled with. Usually only transition metals have this notation.
-
- Posts: 52
- Joined: Wed Sep 18, 2019 12:21 am
-
- Posts: 51
- Joined: Wed Sep 18, 2019 12:21 am
Re: Roman Numeral
Debora Fernandez Clemente_ 4H wrote:How do you calculate the oxidation number of the metal in a complex?
To calculate the oxidation number of the metal in a complex, you would use the equation:
(# metal atoms)(oxidation number of the metal)+(# each ligand)(charge of each ligand)= charge of ion
-
- Posts: 100
- Joined: Fri Aug 30, 2019 12:15 am
-
- Posts: 52
- Joined: Wed Sep 18, 2019 12:18 am
-
- Posts: 51
- Joined: Wed Sep 18, 2019 12:19 am
-
- Posts: 84
- Joined: Sat Sep 14, 2019 12:16 am
-
- Posts: 99
- Joined: Sat Jul 20, 2019 12:15 am
Who is online
Users browsing this forum: No registered users and 10 guests