Question

The IUPAC name of:

$HC\equiv C-C{H}_2-\stackrel{C{H}_2=CH}{C{H}_2-\stackrel{|}{C}}=CH-\stackrel{H}{\stackrel{|}{C}}=O$

• A. 3-(1-butynyl)-2,4-pentadienal
• B. 5-Ethynyl-3-vinyl-2-pentenal
• C. 3-ethenyl-2-hepten-6-ynal
• D. 5-Acetyl-3-ethenyl-2-pentenal

Answer 1

The correct option is C 3-ethenyl-2-hepten-6-ynal

$HC\equiv C-C{H}_2-\stackrel{C{H}_2=CH}{C{H}_2-\stackrel{|}{C}}=CH-\stackrel{H}{\stackrel{|}{C}}=O$

7 6 5 4 3 2 1

IUPAC name for the above compound is 3-ethenyl-2-hept-2-en-6-ynal.

In this compound, CHO is a functional group.

So answer is C.