Question

IUPAC name of $H_5{C}_2-\underset{CHO}{\underset{|}{C}H}-\underset{C{H}_3}{\underset{|}{C}H}-C_2{H}_5$ is __________.

• A. 2-ethyl-3-methylpentanal
• B. 4-methylhexanal
• C. 3-ethyl-2-methylpentanal
• D. 3,3-diethylpropanal

Answer 1

Answer: (A)

2-ethyl-3-methylpentanal

$H_5{C}_2-\underset{CHO}{\underset{|}{\stackrel{2}{C}H}}-\underset{C{H}_3}{\underset{|}{\stackrel{3}{C}H}}-\stackrel{4}{C}{H}_2-\stackrel{5}{C}{H}_3$

In aldehyde, the carbon of the oxo group is considered as 1.

$2-$ethyl$-3-$methylpentanal.

Here the functional group is an aldehyde.

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