Which one of the following reactions is consistent with the Markovnikov's rule?
A
(CH3)2CH−CH=CH2+H2O→(CH3)2CH−CH2−CH2−OH
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B
CH3−CH2−CH=CH2+H2O→CH3−CH2−CH2−CH2−OH
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C
CH3CH=CHCH3+H2O→CH3CH2−CH(CH3)−OH
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D
H2C=CHCH3+H2O→H3C−CH(OH)−CH3
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Solution
The correct option is DH2C=CHCH3+H2O→H3C−CH(OH)−CH3
Markownikoff's rule can be stated that with the addition of a protic acid HX to an unsymmetrical alkene the hydrogen atom is added to the carbon with the greater number of hydrogen atoms while the X component is added to the carbon with the fewer number of hydrogen atoms.
Anti-Markownifkoff's reaction is exactly the opposite of Markovnikov reaction
In the above question, all reactions are anti-Markovnikov reactions except option-4. this reaction is consistent with Markovnikov' rule.