Alkane

Let's take a closer look at the alkane. Alkane does not have any functional group. They are saturated hydrocarbons. Have you ever wondered what it means by n-butane, n-pentane? n refers to normal or straight chain hydrocarbon. Why it does not apply to propane? This is because ... propane has no isomers. n- only for isomers, starting from butane. You have isobutane, isopentane, etc.