Sodium salts of the bipyridine dianion: Polymer [(bpy)(2-){Na+(dme)}(2)](infinity), cluster [(Na8O)Na-6+(6)+(bpy)(6)(2-)(tmeda)(6)], and monomer [(bpy)(2-){Na+(pmdta)}(2)]
H. Bock et al., Sodium salts of the bipyridine dianion: Polymer [(bpy)(2-){Na+(dme)}(2)](infinity), cluster [(Na8O)Na-6+(6)+(bpy)(6)(2-)(tmeda)(6)], and monomer [(bpy)(2-){Na+(pmdta)}(2)], ANGEW CHEM, 38(7), 1999, pp. 952-955