The IUPAC name of C H_3 C CCH , (C H_3 )_2 is - Vidyadip

MCQ

The $ IUPAC$ name of $C{H_3}C \equiv CCH\,{(C{H_3})_2}$ is

✓
$4$ methyl$-2 $ pentyne
B
$4, 4-$dimethyl$-2-$butyne
C
Methyl isopropyl acetylene
D
$2-$methyl$-4-$pentyne

✓

Answer

Correct option: A.

$4$ methyl$-2 $ pentyne

a
$C{H_3}C \equiv CCH\,{(C{H_3})_2}$ is the required structure.

Now, we start numbering from the leftmost carbon as by doing that, the triple bond will be on $2^{nd}$ carbon.

Hence, the name of the compound will be $4$methyl-$2$-pentyne as there are $5$ carbons on the parent chain.

Hence, (a) is correct answer.

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