Butane is the n = 4 case in the series of alkane
single-bond chain hydrocarbon
s, each made up of n carbon
atoms and 2n+2 hydrogen
atoms. The two forms of butane are n-butane and 2-methyl
. An unofficial
name for the second form of butane is isobutane, because it is the one and only isomer
of the chemical.
n-butane boils at -0.5° C (31.1° F); isobutane boils at -11.7° C (10.9° F).