NEET Chemistry NEET PYQ-IUPAC and Isomerism

  • question_answer
    \[C{{H}_{3}}-CHCl-C{{H}_{2}}-C{{H}_{3}}\] has a chiral centre. Which one of the following represents its R configuration? [AIPMT (S) 2007]

    A) \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\  & {{H}_{3}}C-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-Cl \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,H \\ \end{align}\]

    B) \[\begin{align}   & \,\,\,\,\,\,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\  & H-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,Cl \\ \end{align}\]

    C) \[\begin{align}   & \,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\  & Cl-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,H \\ \end{align}\]

    D) \[\begin{align}   & \,\,\,\,\,\,\,\,\,C{{H}_{3}} \\  & H-\overset{|}{\mathop{\underset{|}{\mathop{C}}\,}}\,-Cl \\  & \,\,\,\,\,\,\,\,\,{{C}_{2}}{{H}_{5}} \\ \end{align}\]

    Correct Answer: A

    Solution :

    [a] \[C{{H}_{3}}\text{ }CHClC{{H}_{2}}C{{H}_{3~}}\]              Priority order is                    


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