question_answer

                                              Identify the organic product obtained in the following reaction. 2, 3-Dimethylbutan-2-ol \[\xrightarrow{Conc.\,{{H}_{2}}S{{O}_{4}}}\]

Answer:

                Dehydration of 2, 3-dimethylbutan-2-ol occurs according to Saytzeff rule as a result of which more highly substituted alkene, i.e., 2, 3-dimethylbut-2-ene is formed as the major product. \[\underset{\begin{smallmatrix}   \\  \text{2,}\,\text{3-Dimethylbutan-2-ol} \end{smallmatrix}}{\mathop{C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  H \end{smallmatrix}}{\overset{\begin{smallmatrix}  {{H}_{3}}C \\  | \end{smallmatrix}}{\mathop{C}}}\,-\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}\xrightarrow[-{{H}_{2}}O]{Conc.\,{{H}_{2}}S{{O}_{4}}}}}\,\]\[\underset{\begin{smallmatrix}  \,\,\,\,\,\,\,\,\,\text{2,}\,\text{3-Dimethylbut-2-ene}\, \\  \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{(major}\,\text{product)} \end{smallmatrix}}{\mathop{C{{H}_{3}}-\underset{{}}{\overset{\begin{smallmatrix}  {{H}_{3}}C \\  | \end{smallmatrix}}{\mathop{C}}}\,=\underset{{}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{3}}}}\,\]\[\,+\,\,\,\,\,\underset{\begin{smallmatrix}  \,\,\,\,\,\,\,\,\,\text{2,}\,\text{3-Dimethylbut-1-ene}\, \\  \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\text{(minor}\,\text{product)} \end{smallmatrix}}{\mathop{C{{H}_{3}}-\underset{{}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{\,\,\,CH}}}\,-\underset{{}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,=C{{H}_{2}}}}\,\]