This diagram shows butane and methylpropane. (Methylpropane used to be called iso-butane, but the correct name is methylpropane). Both have a molecular formula of \({C_4}{H_{10}}\). The structural ...

2 The ease of replacement of the hydrogen atoms of an alkane by the sulfonic acid group follows the order; consequently, tertiary alkanes may be directly sulfonated under the appropriate conditions.