How many structural isomers does C$_4$H$_{10}$ have?
A1
B2CORRECT
C3
D4
JUPEBChemistryOrganic Chemistry: Hydrocarbons
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Why the answer is B, and why the others tempt you.
Butane can exist as a straight chain (CH$_3$CH$_2$CH$_2$CH$_3$) or as a branched chain (2-methylpropane, CH$_3$CH(CH$_3$)CH$_3$). Three isomers first appear at C$_5$H$_{12}$.
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