2-methylpropane is the IUPAC name for iso Butane because the longest carbon chain in the molecule is 3 carbon atoms long. This chemical is an isomer of n-Butane because they have the same constituent atoms. The structure of the chemical is as follows:

     H     H     H
     |     |     |
     |     |     |
     H   H-C-H   H
Some data about 2-methylpropane:

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