MCQ
The $IUPAC$ name of is

$C{H_3} - \mathop {\mathop {C = }\limits_{|\,\,\,\,} }\limits_{C{l_{}}\,} \mathop {\mathop {C\, - }\limits_{|\,\,\,\,\,\,} }\limits_{C{H_3}\,} \mathop {\mathop {CH - \,}\limits_{|\,\,\,\,\,\,\,\,\,} }\limits_{{C_2}{H_5}\,} C{H_2} - C \equiv CH$

  • $6-$ chloro $-4-$ ethyl $-5-$ methyl-hept $-5-$ en $- 1- $ yne
  • B
    $6-$ chloro $-4-$ ethyl $-5-$ methyl-hept $-1-$ yn $- 5-$ ene
  • C
    $ 2-$ chloro $-4-$ ethyl $-3-$ methyl-hept $-2-$ en $-6 -$ yne
  • D
    $2-$ chloro $-4-$ ethyl $ -3-$ methyl-hept $-6-$ yn $-2- $ ene

Answer

Correct option: A.
$6-$ chloro $-4-$ ethyl $-5-$ methyl-hept $-5-$ en $- 1- $ yne
a
Here there are $7$ carbons. So it is heptane. Chlorine is in $6^{th}$ position and triple bond should be given the highest preference so it is given 1st position and double bond is given the next priority.

So, the IUPAC name is $6$-chloro-$4$-ethyl-$5$-methylhept-$5$-en-$1$-yne.

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