IUPAC name of the following compound is C H 3 − C H = C H − C ≡ H ? Options: A . &nbsp 5-Pentyn-3-ene B . &nbsp 3-Penten-1-yne C . &nbsp 1-Pentyn-3-ene D . &nbsp None of these

IUPAC name of the following compound is CH3−CH=CH−C≡H?

Question -

IUPAC name of the following compound is $C H_{3} - C H = C H - C \equiv H$ ?

Options:

A . 5-Pentyn-3-ene

B . 3-Penten-1-yne

C . 1-Pentyn-3-ene

D . None of these

Answer: Option B
:
B

$1 C H_{3} 5 - 2 C H 4 = 3 C H 3 - 4 C 2 \equiv 5 C H 1$
From lowest sum rule, we will select $1, 3$ and not $2, 4$

Five carbons $\Rightarrow$ word root = pent

3-Penten-1-yne

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