Question

$C{H}_2=\underset{Cl}{\underset{|}{C}}-\underset{OH}{\underset{|}{CH}}-C{H}_3$

Write IUPAC name of the following compound.

Answer 1

$\stackrel{1}{C}{H}_2=\stackrel{2}{\underset{|}{C}}-\stackrel{3}{\underset{|}{C}H}-\stackrel{4}{C}{H}_3$

$Cl$ $OH$

According to IUPAC rules, double bond is given preference, so labeling starts from left $Cl⟶$ chloro $OH⟶$ Hydroxy

IUPAC name is $3-hydroxy2-chlorobut-1-ene$