Photochemistry induced by metal-to-ligand charge transfer excitation

The photoreactivity of coordination compounds in a MLCT excited state can b e attributed to the nature of the oxidized metal and/or the reduced ligand. The general features of such photoreactions have been recently reviewed (A . Vogler, H. Kunkely, Coord. Chem. Rev. 177 (1998) 81). The present report contains an update of our observations on this subject. In particular, the spectroscopy and photochemistry of the following complexes is discussed: [R e-I(CO)(4)S2COEt], [Fe-II(CN)(5)ONPh](3-), [(C7H7)Mo-0(CO)(3)](+), [Fe-2(CO )(6)S-2], Pd-0[(PPh2-C5H4)(2)Fe-II](2), Rh-I(PPh3)(2)(CS)CI and [(i-C3H7C5H 4)(2)WH2].9,10-phenanthrenequinone. (C) 2000 Elsevier Science S.A. All righ ts reserved.