High Quality Content by WIKIPEDIA articles! 2,2`-Bipyridine is a organic compound with the formula (C10H8N2). This colorless solid, commonly abbreviated bipy or bpy (pronounced "bip-ee"), is an important isomer of the bipyridine family. It is a bidentate chelating ligand, forming complexes with many transition metals. Ruthenium complex and platinum complexes of bipy exhibit intense luminescence, which may have practical applications.