×

Hello! Socratic's Terms of Service and Privacy Policy have been updated, which will be automatically effective on October 6, 2018. Please contact hello@socratic.com with any questions.

What are the isomers of butane?

1 Answer
Feb 15, 2015

Butane, or #C_4H_10#, has two structural (also called constitutional) isomers called normal butane, or unbranched butane, and isobutane, or i-butane. According to IUPAC nomenclature, these isomers are called simply butane and 2-methylpropane.

As you know, isomers are molecules that have the same molecular formula but different chemical structures. In the case of butane, its two isomers will have these structural formulas

http://science.uvu.edu/ochem/index.php/alphabetical/c-d/constitutional-isomers/

Notice that isobutane has a propane parent chain with a methyl group - #CH_3# attached to the second carbon of the chain - that is why its IUPAC name is 2-methylpropane.

http://www.meritnation.com/ask-answer/question/draw-3-structural-isomers-butane-plzz-help/carbon-and-its-klzzwxh:0013/1828050