A dimetallic biscyclometalated ruthenium complex,[(bpy) 2Ru (dpb) Ru (bpy) 2] 2+, with a tris- bidentate coordination mode was prepared. The electronic properties of this complex were studied by electrochemical and spectroscopic analysis and DFT/TDDFT calculations on both rac and meso isomers. The charge delocalization of the corresponding one-electron- oxidized complex was studied with spectroscopic, theoretical, and EPR analysis and ...