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Preparation of Alcohols from Alkenes

Why alcohol c...

Question

Why alcohol cannot be used as solvents for grignard reagent ?

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Solution

Compunds containing active hydogen like alchols, acids, amines,ammonia, acetylene react with carbanion of Grignards reagent and form corresponding alkanes.
(alcohols contain acidic hydrogen)
for example
Methyl magnesium bromide reacts with ethanol and methanol to form methane.

CH3MgBr + C2H5OH = CH4 + Mg(OC2H5)Br

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Q. Alcohols cannot be used as a solvent for Grignard reagent. Give reason?

Q. Why is water not used as solvent synthesis of Grignard reagent?

Q. Ethyl alcohol cannot be used as a solvent for

C_{2} H_{5} M g I

Grignard reagent is usually prepared by :

R - X + M g E t_{2} O - -- \to R M g X

Grignard reagent

A r - X + M g E t_{2} O - -- \to A r M g X

Grignard reagent

Grignard reagent acts as a strong base. Grignard reagent carry out nucleophilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecule of ether is an important factor in the formation and stability of Grignard reagent.

Which of the following Grignard reagents are not possible ?

Q. How many moles of grignard reagent can be used by this compound?

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Preparation of Alcohols from Alkenes

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