How many structural isomers can be proposed for a formula of #C_4H_8#?

1 Answer
anor277
Feb 4, 2017

Well, I count 5 structural isomers........

Explanation:

#C_4H_8# has one degree of unsaturation, and thus whatever the compound we have the one degree of unsaturation, i.e. one olefinic bond, or 1 ring junction.

So I count 2 ring structures: #"cyclobutane"#; and #"methylcyclopropane."#

And I count 3 olefinic structural isomers: #"1-butylene"#; #"2-butylene"#; #"2-methylpropene"#. #"2-butylene"# can exist as 2 geometric isomers, which are?

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