Bipyridine Acids 6 article 6 chemical structure 6 2,2' bipyridine 4 2,2'-Dipyridyl 4 Aqua ligands 4 Asymmetric units 4 Atoms 4 Binding energy 4 Binding modes 4 Butane 4 Chemical units 4 Dihydrate 4 Dioic acids 4 Donor atoms 4 Electrochemistry 4 Electrolysis 4 Enzymes 4 Gadolinium 4 Holmium 4 Hydrates 4 Itaconic acids 4 Lanthanide complexes 4 Ligands 4 Liquefied petroleum gas 4 Molecular Structure 4 Negative ions 4 Osmium 4 Polymeric structures 4