Synthesis, structural, spectroscopic and electrochemical characterization of new ruthenium(II) tetramer complexes containing 1,4-Bis(diphenylphosphine)butane and alterdentate ligands - Queiroz, Salete Linhares; Kikuti, Elaine; Ferreira, Antonio G.; Santiago, Marcelo O.; Batista, Alzir Azevedo; Castellano, Eduardo Ernesto; Ellena, Javier (Supramolecular Chemistry, 2004)