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Grignard Reagents

Grignard reag...

Question

Grignard reagent behaves as _______.

A

Strong acid

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B

Strong base

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C

Neutral

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D

None of thses

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Solution

The correct option is B Strong base
Grignard reagents are strong bases and strong nucleophiles, chemically it resembles carbanions i.e negatively charged carbon. Organic derivatives of magnesium commonly represented by the general formula $R M g X$ . $R$ is a hydrocarbon and $X$ is a halogen.

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Q. Grignard reagent behave as

Grignard reagent is usually prepared by :

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

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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 ?

Grignard reagent is usually prepared by :

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

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

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How many different Grignard reagents when react with

E t O H

n -

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Q. Consider the following statements:
I.

H {N O}_{3}

(strong acid) behaves as a base in

H F

H_{2} {S O}_{4}

dissociates to a small extent in glacial acetic acid.
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Q. Alcohols cannot be used as a solvent for Grignard reagent. Give reason?

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