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Question:

The IUPAC name of the following compound is:

cis-3-iodo-4-chloro-3-pentene

trans-3-iodo-4-chloro-3-pentene

trans-2-chloro-3-iodo-2-pentene

cis-2-chloro-3-iodo-2-pentene

Solution:

Correct IUPAC name of above compound is trans-2-chloro-3-iodo-2-pentene.