Variable Reduction Sequences for Axial (L) and Chelate Ligands (N$\cap$N) in Rhenium(I) Complexes (N$\cap$N)Re(CO)3(L)n. Inorganic Chemistry, (37)21:5664--5671, 1998. [PUMA: bipyridazine bipyridine carbonyl complex complex;methylpyrazinium complex;tetraazaphenanthrene diimine electroredn electroredn;bipyridine electroredn;bipyrimidine electroredn;electroredn electroredn;spectroelectrochem methylbipyridinium methylpyrazinium rhenium]