# Why does iodine have different colors in different media?

It is violet in trichloromethane, but brown in water. why? In the Shriver Atkins book, they tried to explain this using Molecular Orbital Theory which was not clear to me

• Welcome to Chemistry.SE! Take the tour to get familiar with this site. Mathematical expressions and equations can be formatted using $\LaTeX$ syntax. For more information in general have a look at the help center. Could you elaborate a little bit more, I cannot follow your thoughts. How do the interactions with the medium influence the energies of iodine? – Martin - マーチン Jul 17 '15 at 7:03