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Question

There is something wrong in the name of a compound named: 2-Bromo-5-chloro-3-methylhex-4-ene. What is wrong in this name as per IUPAC convention?

A
Locants are not written in descending order of their position
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B
Parent chain is incorrectly numbered
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C
Alkyl locant is always written first
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D
Locants are not written in ascending order of their positoin.
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Solution

The correct option is B Parent chain is incorrectly numbered
The wrong name of a compound is 2-Bromo-5-chloro-3-methylhex-4-ene. here mistake is numbering of carbon chain.

According to IUPAC the parent chain must be numbered giving lowest number to double bond as:



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