Chapter 3 - Structure and Stereochemistry of Alkanes - Problems - Page 122: Problem 3-28 a

cis-1,3-dimethylcyclohexane (IUPAC) Both substituents have the same orientation, so we name the molecule as cis. There are six carbons, arranged in a ring, so the parent is a cyclohexane and having two substituents groups attached at the one and three positions which are both methyl groups, and thus are named as dimethyl. Therfore in the IUPAC naming system, this molecule is cis-1,3-dimethylcyclohexane.

cis-1,3-dimethylcyclohexane (IUPAC) Both substituents have the same orientation, so we name the molecule as cis. There are six carbons, arranged in a ring, so the parent is a cyclohexane and having two substituents groups attached at the one and three positions which are both methyl groups, and thus are named as dimethyl. Therfore in the IUPAC naming system, this molecule is cis-1,3-dimethylcyclohexane.