Question

$C{H}_3$ $C{H}_3$

$H_{3}C-C{H}_2-\stackrel{|}{CH}-\stackrel{|}{CH}-C{H}_3$

Write the IUPAC name of the given compound.

• A. 2,3-dimethylpentane
• B. 3,4-dimethylhexane
• C. 2-sec-butylbutane
• D. 2,3-dimethylbutane

Answer 1

The correct option is A 2,3-dimethylpentane

$C{H}_3$ $C{H}_3$

$H_3\underset{5}{C}-\underset{4}{C}{H}_2-\stackrel{|}{\underset{3}{C}H}-\stackrel{|}{\underset{2}{C}H}-\underset{1}{C}{H}_3$

Numbering the longest carbon chain, and considering that two methyl groups are attached at second and third carbon, we get IUPAC name as $2,3-dimethylpentane$.