Structure and Spectroelectrochemistry (UV/Vis, IR, EPR) of the Acceptor-Bridged Heterodinuclear Complex (h5-C5Me5)ClRh(m-bptz)Re(CO)3Cl(PF6), bptz = 3,6-Bis(2-pyridyl)-1,2,4,5-tetrazine. Organometallics, (20)7:1437--1441, 2001. [PUMA: carbonyl complex complex;cyclic complex;electrochem complex;mol complex;rhenium crystal cyclopentadienyl electrochem;spectroelectrochem heterodinuclear prepn pyridyltetrazine redn rhenium rhodium structure voltammetry]