How do you name [Co(en)2CO3]Br?
Assuming you mean...
this is a carbonatobis(ethylenediamine)cobalt(III) bromide isomer (either
#"en"#, ethylenediamine, is a neutral ligand. The complex name warrants a new kind of prefix, bis, to indicate that there are two of them. If there were three, one would use tris. #"CO"_3^(2-)#is the carbonato ligand. #"Br"^(-)#in the outer coordination sphere implies that the inner coordination sphere is a #+1#charge overall.
- Thus, the oxidation state of cobalt is
There are, however, two isomers that you should be aware of... the
There are two isomers for this complex:
There is not a third, where the carbonato is "bonded" trans, because it is a bidentate ligand. It would be too strained to bond across a
#Delta#means that of two identical bidentate ligands, with one of them as a rear fin, the other is a right-handed fin.
#Lambda#means that of two identical bidentate ligands, with one of them as a rear fin, the other is a left-handed fin.
These are optical isomers, and are non-superimposable mirror images of each other, basically a complicated enantiomer.