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DUMET Medical DUMET Medical Solved Paper-2002

  • question_answer
    Which of the following is the IUPAC name of the given compound? \[C{{H}_{3}}-CH=\underset{\begin{smallmatrix}  | \\  C{{H}_{2}}-C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]

    A)  3-methyl-3-pentene

    B)  2-ethyl-2-butene

    C) - 3-methyl-2-pentene

    D)  3-ethyl-2-butene

    Correct Answer: C

    Solution :

    Key Idea: Select the longest possible carbon atom chain, number it and then name it according to IUPAC rules. \[\underset{3-methyl-2-pentene}{\mathop{\overset{1}{\mathop{C}}\,{{H}_{3}}-\overset{2}{\mathop{C}}\,H=\underset{\begin{smallmatrix}  | \\  ^{^{4}C{{H}_{2}}{{-}^{5}}C{{H}_{3}}} \end{smallmatrix}}{\mathop{\overset{3}{\mathop{C}}\,}}\,-C{{H}_{3}}}}\,\]


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