MCQ
The $IUPAC$ name of the following compound is
  • trans$-{2-}$chloro$-{3-}$iodo$-{2-}$pentene
  • B
    cis$-{3-}$iodo$-4-$chloro$-{3-}$pentane
  • C
    trans$-{3-}$iodo${-4}-$chloro$-{3-}$pentene
  • D
    cis$-{2-}$chloro$-{3-}$iodo$-{2-}$pentene.

Answer

Correct option: A.
trans$-{2-}$chloro$-{3-}$iodo$-{2-}$pentene
a
The parent hydrocarbon contains $5 C$ atom continuous chain with one $C = C$ bond between second and third carbon atom. Hence, it is named as $2$-pentene.

One $Cl$ and one $I$ are present at second and third carbon atom respectively. The molecule has trans geometry across $C = C$ bond.

Hence, it is named trans-$2$-chloro-$3$-iodo-$2$-pentene.

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