2,2'-dipyridyl

2,2′-dipyridyl

[¦tü ¦tü‚prīm dī′pir·ə·dəl] (organic chemistry) C10H8N2 A crystalline substance soluble in organic solvents; melting point is 69.7°C; used as a reagent for the determination of iron. Also known as 2,2′-bipyridine.