How can you find oxidation numbers in complex compounds?

↳Redirected from "What polyatomic ion has a positive charge?"
1 Answer
anor277
Aug 21, 2016

Do you mean oxidation numbers in coordination complexes, e.g. #[Fe(C-=N)_6]^(3-)#, #CoCl_6^(3-)#, #Cr(CO)_6#?

Explanation:

You have the starting complex, and its charge. Remove the ligands, with their associated charge, and examine the residual charge on the metal centre, which will be the oxidation state.

#[Fe(C-=N)_6]^(3-)rarr6xxN-=C^(-) + Fe^(3+), " ferric ion"#

#[CoCl_6]^(3-)rarr6xxCl^(-) + Co^(3+), " Co(III)"#.

#[Cr(CO)_6]rarr6xxC-=O + Cr " Cr(0)"#.

Is this for what you are looking?

Related questions
See all questions in Oxidation Numbers
Impact of this question
15842 views around the world
You can reuse this answer
Creative Commons License