JEE Main & Advanced Chemistry Carboxylic Acids Question Bank Properties of Carboxylic Acids and Their Derivatives

  • question_answer
    \[C{{H}_{3}}COOH\] is reacted with \[CH\equiv CH\] in presence of \[H{{g}^{++}},\] the product is                                           [DPMT 2004; BHU 1998]

    A) \[\underset{\underset{C{{H}_{2}}(OOC{{H}_{3}})\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{3}}(OOCC{{H}_{3}})}}\,\]               

    B)                 \[\underset{\begin{smallmatrix}  \,\,| \\  C{{H}_{2}}-(OOC-C{{H}_{3}})\,\, \end{smallmatrix}}{\mathop{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,\]

    C)                 \[\underset{\begin{smallmatrix}  \,\,| \\  CH{{(OOC-C{{H}_{3}})}_{2}} \end{smallmatrix}}{\mathop{C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,\]

    D)                 None of these

    Correct Answer: C

    Solution :

               \[CH\equiv CH+C{{H}_{3}}COOH\xrightarrow{[H{{g}^{2+}}]}\]\[\underset{Vinyl\,acetate}{\mathop{{{H}_{2}}C=CH-OCOC{{H}_{3}}}}\,\xrightarrow{C{{H}_{3}}COOH}\]\[\underset{Ethylidene\,acetate}{\mathop{C{{H}_{3}}-CH{{(O-COC{{H}_{3}})}_{2}}}}\,\] This reaction is an example of addition reaction.


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