Studies on ruthenium(III) chalcone thiosemicarbazone complexes as catalysts for carbon-carbon coupling

New six-coordinate ruthenium(III) complexes [RuX(EPh3)(2)(L)] (X = Cl or Br; E = P or As; L = chalcone thiosemicarbazone) have been prepared by reacting [RuX3(EPh3)(3)] (X = Cl or Br; E = P or As) with chalcone thiosemicarbazones in benzene under reflux. The new complexes have been characterized by analytical and spectroscopic (IR, electronic, mass, and EPR) data. The redox behavior of the complexes has also been studied. Based on the above data, an octahedral structure has been assigned for all the complexes. The new complexes exhibit catalytic activity for carbon-carbon coupling reactions.