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What is oxmercurationdemercuration reaction​............!!!!!

What is oxmercurationdemercuration reaction​............!!!!!

Grade:12th pass

2 Answers

Pawan Prajapati
askIITians Faculty 6821 Points
7 months ago
Answer:

Oxymercuration-demercuration: A reaction in which an alkene is reacted with a Hg2+ salt and an oxygen nucleophile (water or an alcohol), to form an organomercury intermediate. The intermediate's carbon-mercury bond is then converted to a carbon-hydrogen bond by treatment with NaBH4.

Thanks
Apurva Sharma
214 Points
7 months ago
Oxymercuration-demercuration is an indirect method of addition of water to alkene for making alcohol.
The reagents used in this reaction are
1)Hg2+ salt (mostly mercuric acetate used)
2)water as a neucleophile (gives OH-)
3)NaBH4 (gives H-)
 
Alkene reacts with mercuric acetate to form an organomercury intermediate, which reacts with NaBH4 and gets reduced to alcohol.
In unsymmetrical alkene MARKOVNIKOV RULE IS FOLLOWED. But
There is NO formation of Carbonation, so no rearrangements are possible.
 
Example of a overall reaction:
CH3CH=CH3 + reagents 1,2&3 ----> CH3CH(OH)CH3
 
Hope you got the complete answer:
Regards!
 
 

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