JEE Main & Advanced Chemistry Aldehydes, Ketones Question Bank Critical Thinking Aldehydes,

  • question_answer
    Which alkene is formed from the following reaction \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CH=PP{{h}_{3}}+2-\,\text{Butanone}\]                [Manipal 2001]

    A)                 3- Methyl-3-heptene

    B)                 4-Methyl-3-heptene

    C)                 5-Methyl-3-heptene

    D)                 1-Methyl-5- methane

    Correct Answer: A

    Solution :

               \[\underset{2-\text{Butanone}}{\mathop{C{{H}_{3}}C{{H}_{2}}-\overset{C{{H}_{3}}\,\,}{\mathop{\overset{|}{\mathop{C}}\,=O}}\,}}\,\,+C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CH=PP{{h}_{3}}\]                 \[\to \underset{\text{3}-\text{methyl,}\,\text{3}-\text{heptene}}{\mathop{C{{H}_{3}}C{{H}_{2}}\overset{C{{H}_{3}}\,\,}{\mathop{\overset{|\,\,\,\,\,}{\mathop{C=}}\,C}}\,HC{{H}_{2}}C{{H}_{2}}C{{H}_{3}}+P{{h}_{3}}PO}}\,\]


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