What is the oxidation number with respect to chromium, and the coordination number for the complex #[Cr(en)_2Cl_2]^(3+)# #("en=ethylenediammine")#?
The coordination number of chromium is 6.
The oxidation number of the metal is
There are 6 nitrogen donors arranged around the metal centre in an octahedron; the
Note that the complex still has isomers possible: an arrangement where the unidentate ammine donors are trans, versus the isomer where these are
The richness of the coordination geometry is one of the reasons why this complex is chosen as an exemplar. Can you tell me why the ethylenediammine ligands are disposed