Spectroelectrochemical characterization of a pyrazine-bridged mixed-valent (4d5/4d6) organometallic analogue of the Creutz–Taube ion

The dinuclear complex ion trans,mer-[(PPri3)2(CO)3Mo(µ-pz)Mo(CO)3(PPri3)2]+(pz = pyrazine), the closest yet reported organometallic analogue of the Creutz–Taube ion [(NH3)5Ru(µ-pz)Ru(NH3)5]5+, has been characterized as a fully delocalized Mo0.5/Mo0.5 system by electrochemistry, EPR, electronic and vibrational absorption spectroscopy.