Question

The correct IUPAC name of the following compound $H_{3}C-CH=\underset{C{H}_3}{\underset{|}{C}-}\underset{Br}{\underset{|}{C}}H-C{H}_3$ is:

• A. 4-bromo-3-methylpent-2-ene
• B. 2-bromo-3-methylpent-4-ene
• C. 3-methyl-4-bromopent-2-ene
• D. 3-methyl-2-bromopent-4-ene
• E. none of the above

Answer 1

The correct option is A 4-bromo-3-methylpent-2-ene

Functional group = ene

Parent chain = pent

locant number =2-ene, 3-methyl, 4-bromo

side group = bromo, methyl (alphabetic order)

therefore IUPAC name is: 4-bromo-3-methylpent-2-ene.

Option A is correct