2-Butene is an acyclic alkene with four carbon atoms. It is the simplest alkene announcement cis/trans-isomerism (also accepted as (E/Z)-isomerism); that is, it exists as two geometrical isomers cis-2-butene ((Z)-2-butene) and trans-2-butene ((E)-2-butene).
It is a petrochemical, produced by the catalytic arise of awkward oil. Its capital uses are in the assembly of gasoline (petrol) and butadiene,although some 2-butene is aswell acclimated to aftermath the bread-and-butter butanone via hydration to 2-butanol followed by oxidation.
The two isomers are acutely difficult to abstracted by beverage because of the adjacency of their baking credibility (~4 °C for cis and ~1 °C for trans). However, break is accidental in a lot of automated settings, as both isomers behave analogously in a lot of of the adapted reactions. A archetypal automated 2-butene admixture is 70% (Z)-2-butene (cis-isomer) and 30% (E)-2-butene (trans-isomer). Butane and 1-butene are accepted impurities, present at 1% or added in automated mixtures, which aswell accommodate abate amounts of isobutene, butadiene and butyne.
Trans-2-Butene is a achromatic gas.The melting point is -105.53 ℃ ,the baking point is 0.88 ℃ . Not deliquesce in water, hardly acrid in benzene.It exists in the catalytic arise refinery gas and petroleum distillates,the carbon 4 got from petroleum hydrocarbons cracking.
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From: Chemical raw material
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