The name of `Cl-CH_(2)-underset(Br)underset(|)(C)= underset(Br)underset(|)(C)-CH_(2)-Cl` according to the `IUPAC` nomenclature system is

Options

A. (1) `2,3`-dibromo-`1,4`-dichlorobut-`2`-ene
B. (2) `1,4`-dichloro-`2,3`-dibromobut-`2`-ene
C. (3) `dichlorodibromobutene
D. (4) dichlorodibromobutane

Answer

A

Explanation

The compound is an alkene with double bond at `C-2`. The names of the substituents should be listed alphabetically:
`Cl-overset(4)(CH_(2))-underset(2,3-"Dibromo-1,4-dichlorobut-2-ene")(underset(Br)underset(|)overset(3)(C)= underset(Br)underset(|)overset(2)(C)-overset(1)CH_(2)-Cl)`