Today in school, my teacher was explaining the different types of alkenes. Examples included ethene, propene, and butene. She also showed us their structural formulas.
I tried to draw butene's formula and came up with this:


Is it correct?

  • $\begingroup$ Welcome to chemistry.SE! If you had any questions about the policies of our community, please ‎visit the help center. $\endgroup$ – M.A.R. Nov 23 '15 at 15:42
  • 2
    $\begingroup$ Correct; and the more common example is 1-butene: H2C=CH-CH2-CH3 $\endgroup$ – khaverim Nov 23 '15 at 16:41
  • 1
    $\begingroup$ And there are also the cis- and trans- forms of 2-butene. And if one just went by the molecular formula, there's cyclobutane and methylcyclopropane as well. $\endgroup$ – orthocresol Nov 23 '15 at 21:34

Yes, the formula you drew is an example of isobutylene. Isobutylene has the "official" IUPAC name of 2-methylpropene, and is an important industrial chemical. Because it:

  1. has a formula of $\ce{C4H8}$, and thus contains four carbon atoms;
  2. contains a carbon-carbon double bond;
  3. and doesn't contain any other functional groups

... it is indeed an isomer of butene (sometimes known as butylene). You got this one right!$%edit$


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.