JEE Main & Advanced Chemistry GOC Question Bank Structural and stereo isomerism

  • question_answer Which will give chiral molecule [DPMT 2005]

    A) \[C{{H}_{3}}COCl\xrightarrow{LiAl{{H}_{4}}}\]

    B) \[{{C}_{2}}{{H}_{5}}CHO\underset{{{H}^{+}}/{{H}_{2}}O}{\mathop{\xrightarrow{C{{H}_{3}}MgBr}}}\,\]

    C) \[{{(C{{H}_{3}})}_{2}}CH{{C}_{2}}{{H}_{5}}\xrightarrow{Cu}\]

    D) \[\begin{matrix}    H  \\    {}  \\    C{{H}_{3}}  \\ \end{matrix}\,\,\,\,\,\,C=C\,\,\,\,\,\,\,\,\begin{matrix}    C{{H}_{3}}  \\    {}  \\    C{{H}_{3}}  \\ \end{matrix}\xrightarrow{C{{l}_{2}}}\]

    Correct Answer: B

    Solution :

    \[{{C}_{2}}{{H}_{5}}CHO\underset{{{H}^{+}}/{{H}_{2}}O}{\mathop{\xrightarrow{C{{H}_{3}}MgBr}}}\,\,\underset{\,\,\,\,\,\,C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{\,H}{\mathop{\overset{|}{\mathop{{{C}_{2}}{{H}_{5}}-{{C}^{*}}-OH}}\,}}\,}}\,}}\,\] \[{{C}^{*}}\]-chiral carbon as all the four valencies are attached with different substituents or groups.

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