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Other Synthesis Methods

Which of the ...

Question

Which of the following compounds will not react with Mg metal in the presence of ether to give a Grignard reagent ?

A

C H_{2} = C H B r

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B

C H_{3} C H_{2} I

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C

C H_{2} O H C H_{2} B r

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D

C H_{3} O C H_{2} C H_{3} I

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Solution

The correct option is C $C H_{2} O H C H_{2} B r$
Compounds containing acidic hydrogen cannot be used in Grignard's synthesis and the compound $C H_{2} O H C H_{2} B r$ contains acidic hydrogen.

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Similar questions

Q. Which of the following does not form Grignard reagent on reaction with

M g

in the presence of ether?

Q. Which of the following can give a Grignard reagent when reacted with magnesium in dry ether?

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.

How many different Grignard reagents when react with

E t O H

n -

butane as product (excluding stereoisomerism)

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. Reaction of Grignard reagent,

C_{2} H_{5} M g B r

C_{8} H_{8} O

followed by hydrolysis gives compound “A” which reacts instantly with Lucas reagent to give compound B,

C_{10} H_{13} C l .

The compound B is:

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Other Synthesis Methods

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