Optical properties of (η7-C7H7)Mo0(CO)2I. Iodide to cycloheptatrienyl ligand-to-ligand charge transfer

The ion pairs C7H7+I− and [(η7-C7H7)Mo0(CO)3]+I− in CH2Cl2 show I−→C7H7+ CT absorptions at λmax=570 and 640 nm, respectively. This outer-sphere CT appears also as an I−→C7H7+ ligand-to-ligand CT band (λmax=735 nm) in the absorption spectrum of the complex (η7-C7H7)Mo0(CO)2I.