Q. The major product formed when a 3, 3-dimethyl butan-2-ol is heated with concentrated sulphuric acid, is
A) 2,3-dimethyl-2-butene
B) 2,3-dimethyl-1-butene
C) 3,3-dimethyl-1-butene
D) $cis\ and\ trans$ isomers of 2,3-dimethyl-1-butene
Explanation
(a)
$CH_{3}$
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$CH_{3} - CH - C - CH_{3}$
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$\ \ \ \ \ \ \ \ \ \ \ \ OH\ \ \ \ \ {CH}_{3}$
3,3-dimethyl butane-2-ol
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}\ \ {CH}_{3}$
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$\underset{- H_{2}O}{\overset{\ \ Conc.H_{2}SO_{4}\ \ \ \ }{\rightarrow}}H_{3}C - C = C - CH_{3}$
2,3-dimethyl-2-butene
(major product)
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.