Chemistry - Nomenclature Question with Solution | TestHub

$\mathrm{OH}$ takes the lowest locant, so the carbon bearing it is ${\mathrm{C}}_2$. The five-carbon chain with the double bond (${\mathrm{C}}_3={\mathrm{C}}_4$) is chosen, and the ethyl group is on ${\mathrm{C}}_3$.

Name: 3-ethylpent-3-en-2-ol.