Electronic coupling of two Cp*ClM+/Cp*M reaction centers via p conjugated bridging ligands: Similarities and differences between rhodium and iridium analogues. Journal of Organometallic Chemistry, (582)2:153--159, 1999. [PUMA: bidentate binuclear bispyridinyltetrazine center;iridium complex coupling diiridium dirhodium electron intermediate iridium redn redox rhodium spectroelectrochem;mixed tetrazinebispyrinyl valent]