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Markovnikov’s Rule

Markovnikov’s Rule

Markovnikov’s Rule

Markovnikov’s Rule

Valadimir Markovnikov observed the pattern of halogenation of alkene where formations of two isomeric products are possible. Markovnikov rule state that in the addition of acid to carbon-carbon double bond of alkene, the hydrogen of acid attaches to the carbon that already holds a greater number of hydrogen.

It’s a regioselective reaction because the addition of acid to an alkene is at a specific position.

Examples:

Mechanism:

It’s an electrophilic addition and involves the formation of a carbocation. The more stable carbocation (3° > 2° > 1°) define the orientation of halide anion.

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