Widely differing stabilities of molecule-bridged cyanodiiron(III,II) species in non-aqueous solvents. Inorganica Chimica Acta, (291)1-2:66--73, 1999. [PUMA: ESR IR UV bipyridine comproportionation const;mixed cyano electrochem iron prepn pyrazine pyridylethene pyrimidyltetrazine pyrimidyltetrazine;iron pyrimidyltetrazine;pyrazine redox redox;electrochem redox;pyridylethene redox;pyrimidyltetrazine valence]