# How many structural isomers can a formula of C_4H_10 generate? Can you account for their normal boiling points of each isomer?

$\text{Butane}$ can generate A PAIR of structural isomers...........
Straight chain $\text{n-butane}$ has a normal boiling point of approx. $0$ ""^@C, $\text{isobutane}$, $\text{2-methylpropane}$, has a normal boiling point of approx. $- 10$ ""^@C. Can you check these boiling points, and suggest why isobutane should be more volatile?