2-Butene2-Butene is an acyclic alkene with four carbon atoms. It is the simplest alkene exhibiting cis/trans-isomerism (also known as (E/Z)-isomerism); that is, it exists as two geometric isomers cis-2-butene ((Z)-but-2-ene) and trans-2-butene ((E)-but-2-ene). Read from the Chembox of the Wikipedia article 2-Butene, revision 1380144476.

Property

Value

Formula

C4H8, 56.11 g/mol

Melting point

-138.9 °C

Boiling point

2.25 °C

Density

0.641 g/cm³

Flash point

-72 °C

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