An organic chemical compound consisting of two pyridine rings bonded together, used in coordination chemistry and as a ligand in metal complexes.
From bi- (two) + pyridine (from pyridyl, from pyridine, from Greek pyridis, fire). Bipyridine emerged as a term in 20th-century organic and coordination chemistry.
Bipyridine is a favorite tool of chemists because it acts like a molecular handhold—metal atoms cling to it, and scientists can adjust the properties of these metal-bipyridine complexes to create everything from light-absorbing dyes to catalysts.
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