Pentene

Straight chain pentenes

1-Pentene
cis-2-Pentene
trans-2-Pentene
Identifiers
CAS Number	109-67-1 (1-pentene) Y 627-20-3 (cis-2-pentene) Y 646-04-8 (trans-2-pentene) Y
3D model (Jmol)	(1-pentene): Interactive image (cis-2-pentene): Interactive image (trans-2-pentene): Interactive image
ChemSpider	7713 (1-pentene) N 4483638 (cis-2-pentene) N 4483639 (trans-2-pentene) N
ECHA InfoCard	100.042.636
EC Number	246-916-6 (1-pentene) 273-308-8 (cis-2-pentene) 271-255-5 (trans-2-pentene)
PubChem	8004 (1-pentene) 5326160 (cis-2-pentene) 5326161 (trans-2-pentene)
InChI (1-pentene): InChI=1S/C5H10/c1-3-5-4-2/h3H,1,4-5H2,2H3 Key: YWAKXRMUMFPDSH-UHFFFAOYSA-N (cis-2-pentene): InChI=1S/C5H10/c1-3-5-4-2/h3,5H,4H2,1-2H3/b5-3- Key: QMMOXUPEWRXHJS-HYXAFXHYSA-N (trans-2-pentene): InChI=1S/C5H10/c1-3-5-4-2/h3,5H,4H2,1-2H3/b5-3+ Key: QMMOXUPEWRXHJS-HWKANZROSA-N
SMILES (1-pentene): CCCC=C (cis-2-pentene): CC/C=C\C (trans-2-pentene): CC/C=C/C
Properties
Chemical formula	C5H10
Molar mass	70.14 g·mol−1
Density	0.64 g/cm3 (1-pentene)
Melting point	−165.2 °C (−265.4 °F; 108.0 K) (1-pentene)
Boiling point	30 °C (86 °F; 303 K) (1-pentene)
Magnetic susceptibility (χ)	-53.7·10−6 cm3/mol
Hazards
Safety data sheet	MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

273-308-8 (cis-2-pentene)
271-255-5 (trans-2-pentene)

Pentenes are alkenes with chemical formula C
5H
10. Each contains one double bond within its molecular structure. There are a total of six different compounds in this class, differing from each other by whether the carbon atoms are attached linearly or in a branched structure, and whether the double bond has a cis or trans form.

1-Pentene is an alpha-olefin. Most often 1-pentene is made as a byproduct of catalytic or thermal cracking of petroleum, or during production of ethylene and propylene via thermal cracking of hydrocarbon fractions. It is rarely isolated as a separate compound. Instead, it is most often blended into gasoline or, in a mixture with other hydrocarbons, alkylated with isobutane to make gasoline.

The only commercial manufacturer of 1-pentene is Sasol Ltd, where it is separated from crude made by the Fischer-Tropsch process.

2-Pentene has two geometric isomers, cis-2-pentene and trans-2-pentene. cis-2-Pentene is used in olefin metathesis.

Alternative names for 1-pentene include amylene, n-amylene, and n-pentene. Alternative names for 2-pentene include beta-n-amylene and sym-methylethylethylene.