Butane has another structural isomer. Draw the two dimensional structure of the isomers and write its IUPAC name

The two structural isomers of butane are n-butane and isobutane.

1) n-Butane:
CH3 - CH2 - CH2 - CH3
IUPAC name: Butane

2) Isobutane:
CH3 - CH(CH3)2
IUPAC name: 2-Methylpropane

The structural isomers of butane can be represented by the following two-dimensional structures:

Isomer 1: n-butane
CH3-CH2-CH2-CH3

Isomer 2: isobutane
CH3-CH(CH3)-CH3

The IUPAC name for the first isomer is "butane."
The IUPAC name for the second isomer is "2-methylpropane."