Question

Give the IUPAC name of the following compound:

\[\begin{array}{cc}
\phantom{.................}\ce{Br}\phantom{....}\ce{CH3}\phantom{.........}\ce{O}\phantom{...}\\
\phantom{................}|\phantom{......}|\phantom{............}||\phantom{..}\\
\ce{CH3 - CH2 - CH2CH - CH - CH2 - C - H}
\end{array}\]

Options

• 4-bromo-3-methylheptanone

• None of these

• 4-bromo-3-methylheptanal

• 3-methyl-4-bromoheptanal

Answer 1

4-bromo-3-methylheptanal

Explanation:

\[\begin{array}{cc}
\phantom{.................}\ce{Br}\phantom{....}\ce{CH3}\phantom{.........}\ce{O}\phantom{...}\\
\phantom{................}|\phantom{......}|\phantom{............}||\phantom{..}\\
\ce{CH3 - CH2 - CH2CH - CH - CH2 - C - H}
\end{array}\]

Since functional group, CHO is present so it is given first priority and consider a part of the main chain. Then the name of substituents is given first in alphabetical order followed by word root which is 'hept' and finally suffix which is 'al'.