Question

There are three structural isomers of C₅H₁₂; draw the one not shown in (a).

Answer 1

The three structural isomers of C₅H₁₂ (pentane) are:

(a) n-pentane:

CH₃CH₂CH₂CH₂CH₃

(b) 2-methylbutane:

CH₃CH(CH₃)CH₂CH₃

(c) 2,2-dimethylpropane:

(CH₃)₂C(CH₃)₂

The structural isomer not shown in (a) is (b) 2-methylbutane.

If you would like a visual representation of (b) 2-methylbutane, here's a simplified 2D structure:

Step-by-step explanation:

CH₃

|

CH₃─C─CH₂CH₃

|

CH₃