UV Absorption of iodine with some solvent
Iodine is highly polarisable and will form a (Mulliken) charge-transfer complex with many aromatics. Very many pairs of donor - acceptor pairs do this and have been studied for approx $100$ years, see for example tetracyanoethylene–pyrene (J. Chem. Phys. 105,1996 p2287) for an ultrafast time resolved study.  In  absorbing a photon the ground state complex DA transfers  an electron directly to a charge transfer state $DA \overset{h\nu} \to \mathrm D^+A^-$. The interaction is thus that of all the orbitals in one molecule with all those in another. 

Books 

R. S. Mulliken and W. B. Person, 'Molecular Complexes' Wiley, New
York, 1969. and G. Briegleb, 'Elektronen Donator Acceptor Komplexe' Springer, Berlin, 1961.