Fulvene

Fulvene
Names
	Preferred IUPAC name 5-Methylidenecyclopenta-1,3-diene
	Other names Fulvene; 5-Methylene-1,3-cyclopentadiene
Identifiers
CAS Number	497-20-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:51999 ;
ChemSpider	120097 ;
PubChem CID	136323;
UNII	19W699IKIE ;
CompTox Dashboard (EPA)	DTXSID30897602 ;
	InChI InChI=1S/C6H6/c1-6-4-2-3-5-6/h2-5H,1H2 Key: PGTKVMVZBBZCKQ-UHFFFAOYSA-N ; InChI=1/C6H6/c1-6-4-2-3-5-6/h2-5H,1H2 Key: PGTKVMVZBBZCKQ-UHFFFAOYAV;
	SMILES C=C1\C=C/C=C1;
Properties
Chemical formula	C6H6
Molar mass	78.114 g·mol−1
Magnetic susceptibility (χ)	-42.9·10−6 cm3/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Fulvene (pentafulvene) is a hydrocarbon with the formula (CH=CH)₂C=CH₂. 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.

Fulvene is an isomer of benzene, which when irradiated at 237 to 254 nm forms small amounts of fulvene along with benzvalene.

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