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2,2'-Bipyridine is a chemical compound with the formula (C5H4N)2. This colorless solid, commonly abbreviated bipy (pronounced "bip-ee"), is a widely used isomer of bipyridine. 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.
Preparation and general properties
Illustrative bipy complexes
Tris(bipy) complexes have three bipyridine molecules are coordinated to a metal ion, written as [M(bipy)3]n+ (M = metal ion; Cr, Fe, Co, Ru, Rh and so on; bpy = 2,2'-bipyridine). These complexes have six-coordinated, octahedral structures and two enantiomers as follows:
These and other homoleptic tris-2,2'-bipy complexes of many transition metals are electroactive. Often, both the metal centred and ligand centred electrochemical reactions are reversible one-electron reactions that can be observed by cyclic voltammetry. Under strongly reducing conditions, most tris(bipy) complexes can be reduced to neutral derivatives containing bipy- ligands. Examples include M(bipy)3, where M = Al, Cr, Si.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "2,2'-Bipyridine". A list of authors is available in Wikipedia.|