Question

Write the IUPAC name of the following compound:

$C{H}_2=C\left(C{H}_3\right)-C\left(H\right)\left(C{H}_3\right)\left(Br\right)$

• A. 3-Bromo-2-methylbut-1-ene
• B. 2-Bromo-2-methylbut-1-ene
• C. 1-Bromo-2-methylbut-1-ene
• D. none of these

Answer 1

The correct option is A 3-Bromo-2-methylbut-1-ene

In the given compound, the parent chain contains 4 carbon atom along with double bond and Bromo group.

The double bond is given minimum position while locating the functional group.

Thus, the double bond is present between carbon 1 and carbon 2 whereas bromine group is present at carbon number 3.

Thus, the IUPAC name of the compound is 3-Bromo--2-methylbut-1-ene.

Hence, the correct option is $\text{A}$