Give the major product obtained from the acid-catalyzed hydration of each of the following alken

step 1 explanation for the question here the major product can be obtained by the addition of an electr

Give the major product obtained from the acid-catalyzed...

Key Concepts

Carbocation Intermediate

The carbocation intermediate is a key species formed during the electrophilic addition mechanism. Its stability largely governs the reaction pathway and the final product distribution. More substituted carbocations are generally more stable due to hyperconjugation and inductive effects, which in turn influences the regioselectivity as described by Markovnikov's rule.

Markovnikov's Rule

Markovnikov's rule predicts the regiochemical outcome of addition reactions to unsymmetrical alkenes. According to this rule, in the addition of a protic acid (or water in acid-catalyzed hydration), the hydrogen atom attaches to the carbon with more hydrogen substituents, while the nucleophile (or OH group) attaches to the carbon with fewer hydrogen atoms. This rule is based on the formation of the most stable carbocation intermediate during the reaction.

Acid-Catalyzed Hydration

This concept refers to the addition of water across a carbon-carbon double bond in the presence of an acid catalyst. In this reaction, the acid protonates the alkene to form a reactive intermediate, which subsequently reacts with water to yield an alcohol. The acid is regenerated at the end, making it a catalyst, and the overall process is an example of electrophilic addition.

Electrophilic Addition Mechanism

This is the reaction pathway by which electrophiles add to alkenes. The mechanism involves the initial attack of the double bond on a proton from the acid, forming a carbocation intermediate. This positive intermediate is then attacked by a nucleophile, such as water, resulting in the formation of a new covalent bond. The mechanism explains the regioselectivity and stereoselectivity observed in many addition reactions.

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