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iso-butene
The isomers of butene are: 1-butene or but-1-ene (CH2=CHCH2CH3); 2-butene or but-2-ene (cis and trans isomers) (CH3CH=CHCH3); and iso-butene (2-methyl-prop-1-ene) (CH3CH2CH=CH2).extracted from butenen.isobutene
isobutene n.
Brit. 
/ˌʌɪsə(ʊ)ˈbjuːtiːn/
, /ˌʌɪsə(ʊ)ˈbjuːtiːn/U.S. /ˌaɪsoʊˈbjuˌtin/
= isobutylene n./ˌaɪsoʊˈbjuˌtin/ΘΚΠ
the world > matter > chemistry > organic chemistry > hydrocarbons > [noun] > alkenes > branched-chain > isobutene
isobutylene1872
isobutene1876
1876 Jrnl. Chem. Soc. 30 397 Isobutene combines readily with hypochlorous acid.
1964 N. G. Clark Mod. Org. Chem. viii. 141 t-Butyl alcohol..is obtained from a 2-methylpropene [isobutene] using 65 per cent sulphuric acid.
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