The IUPAC name of CH3-CH=CH-C≡ CH is

Question

The IUPAC name of CH3-CH=CH-C≡ CH is (A) Pent - 3-en-1-yne (B) Pent-2-en-3-yne (C) Pent-3-en-4-yne (D) Pent-2-en-4-yne

Tardigrade Admin · Accepted Answer

Using IUPAC rules this compound can be named as underset textPent - 3 - texten - 1 - textyne overset overset5 textC textH3 - overset4 textC textH = overset3 textC textH - overset2 textC ≡ overset1 textC textH As here triple bond is at corner, so it is preferred over double bond for numbering.

Q. The IUPAC name of $C H_{3} - C H = C H - C \equiv C H$ is

Pent - 3-en-1-yne

Pent-2-en-3-yne

Pent-3-en-4-yne

Pent-2-en-4-yne

Using IUPAC rules this compound can be named as
$Pent - 3 - en - 1 - yne C 5 H_{3} - C 4 H = C 3 H - C 2 \equiv C 1 H$
As here triple bond is at corner, so it is preferred over double bond for numbering.

Q. The IUPAC name of CH3​−CH=CH−C≡CH is