Question

Draw the isomers and write the IUPAC names for an alkane with a molecular mass of 58.

Answer 1

Butane, or C4H10 , has two structural (also called constitutional) isomers called normal butane, or unbranched butane, and isobutane, or i-butane. ... Notice that isobutane has a propane parent chain with a methyl group - CH3 attached to the second carbon of the chain - that is why its IUPAC name is 2-methylpropane.