title: Fulvene
text: # Fulvene
  
  Fulvene (pentafulvene) is a hydrocarbon with the formula $(CH=CH)_2C=CH_2.$ It is a prototype of a cross-conjugated hydrocarbon. Fulvene is rarely encountered, but substituted derivatives (fulvenes) are numerous. They are mainly of interest as ligands and precursors to ligands in organometallic chemistry.
  
  