NEET AIPMT SOLVED PAPER 1998

  • question_answer
                    IUPAC name of the compounds                                                                                                                               

    A)                 trans-3 iodo- 4 chloro-3-pentene                            

    B)                 cis-2-chloro-3-iodo-2-pentene

    C)                 trans-2-chloro-3-iodo-2-pentene                            

    D)                 cis-3-iodo-4-chloro-3-pentene

    Correct Answer: C

    Solution :

                                    In these groups preferential order is                 \[-Cl>-C{{H}_{3}}\] and \[-l\,>-C{{H}_{2}}-C{{H}_{3}}\]                 Hence, more preferential order containing groups are attached in opposite sides. So it is E (trans) isomer. Thus its name is trans-2-chloro-3-iodo-2-pentene


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