Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2008

  • question_answer
    The reaction,\[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\xrightarrow{{}}\]                \[{{C}_{6}}{{H}_{5}}CH=CHCOO{{C}_{2}}{{H}_{5}},\]  is called

    A)  Benzoin condensation

    B)  Claisen condensation

    C)  Cannizaro's reaction

    D)  Perkin reaction

    Correct Answer: B

    Solution :

    Claisen condensation: Aromatic aldehyde condenses with esters having \[\alpha \]-hydrogen atoms like ethyl acetate, in the presence of metallic \[Na\]and \[{{C}_{2}}{{H}_{5}}OH\] to form esters of \[\alpha ,\]\[\beta \]-unsaturated acids. \[\underset{benzaldehyde}{\mathop{{{C}_{6}}{{H}_{5}}CHO}}\,+\underset{ethyl\,acetate}{\mathop{{{H}_{2}}CH-COO{{C}_{2}}{{H}_{5}}}}\,\xrightarrow[{{C}_{2}}{{H}_{5}}OH]{Na}\]\[\underset{ethyl\,cinnamate}{\mathop{{{C}_{6}}{{H}_{5}}CH=CHCOO{{C}_{2}}{{H}_{5}}}}\,+{{H}_{2}}O\]


You need to login to perform this action.
You will be redirected in 3 sec spinner