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Question

The name of below compound according to IUPAC nomenclature system is:

A
2,3-Dibromo-1,4-dichlorobut-2-ene
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B
1,4-Dichloro-2,3-dibromobut-2-ene
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C
Dichlorobromobutene
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D
Dichlorobromobutane
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Solution

The correct option is A 2,3-Dibromo-1,4-dichlorobut-2-ene

X (F, Cl, Br, I) does not have any priority order and considered as alkyl substituents while numbering.

the correct IUPAC name is

2,3-Dibromo-1,4-dichlorobut-2-ene.


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