Answer
The IUPAC name of the compound is $(Z)-2,3-dimethylpent-2-ene-1-thiol$
Work Step by Step
The compound has 5 carbon atoms in its longest chain. It has 2 methyl substituents at positions 2 and 3, a double bond at position 2 and the thiol group at position 1. Its two carbons of the double bond have the $Z$ structure. So, the IUPAC name of the compound is $(Z)-2,3-dimethylpent-2-ene-1-thiol$
