Question
Write the structural formulae for the following IUPAC names: Pent-2-one
✓
Answer
Pent-2-one.
(1) Pent stands for 5 carbon atoms in a chain.
Number the carbon atoms in a chain as 1, 2, 3,…..
$\stackrel{1}{\mathrm{C}}-\stackrel{2}{\mathrm{C}}-\stackrel{3}{\mathrm{C}}-\stackrel{4}{\mathrm{C}}-\stackrel{5}{\mathrm{C}}$
(2) ‘one’ stands for functional group
ketone. The number assigned for the ketone group is 2 . Show the ketone group at $C_2$.
(3) Now satisfy the valencies of each carbon atom
(1) Pent stands for 5 carbon atoms in a chain.
Number the carbon atoms in a chain as 1, 2, 3,…..
$\stackrel{1}{\mathrm{C}}-\stackrel{2}{\mathrm{C}}-\stackrel{3}{\mathrm{C}}-\stackrel{4}{\mathrm{C}}-\stackrel{5}{\mathrm{C}}$
(2) ‘one’ stands for functional group
ketone. The number assigned for the ketone group is 2 . Show the ketone group at $C_2$.
(3) Now satisfy the valencies of each carbon atom
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