A) 3, 3-dimethyl -1-butene
B) 2, 3 -dimethyl-1-butene
C) 2, 3-dimethyl-2-butene
D) none of these
Correct Answer: C
Solution :
\[\underset{\text{3,3-dimethyl 2-butanol}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{OH}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\xrightarrow[{{H}^{+}}]{{{H}_{2}}S{{O}_{4}}}}}\,\] \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-\underset{O{{H}_{2}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\xrightarrow{-{{H}_{2}}O}\] \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-{{C}^{+}}\,H-C{{H}_{3}}\xrightarrow{{}}\] \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,-\overset{H}{\mathop{\overset{|}{\mathop{\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{3}}\xrightarrow{-{{H}^{+}}}\] \[\underset{\text{2,3-dimethyl 2 butene}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,=\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,-C{{H}_{3}}}}\,\]
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