Electron transfer reactions -- Proton-coupled electron transfer in hydrogen and hydride transfer reactions -- Oxygen atom transfer -- Mechanisms of oxygen binding and activation at transition metal centers -- Activation of molecular hydrogen -- Activation of carbon dioxide -- Chemistry of bound nitrogen monoxide and related redox species -- Ligand substitution dynamics in metal complexes -- Reactivity of inorganic radicals in aqueous solution -- Organometallic radicals: thermodynamics, kinetics, and reaction mechanisms -- Metal-mediated carbon-hydrogen bond activation -- /solar photochemistry with transition metal compounds anchored to semiconductor surfaces