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

Answer 1

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: