MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Polymerisation of Alkynes

Which of the ...

Question

Which of the following statements about Grignard reagent is false?

A

Grignard reagents (RMgBr) add to the carbonyl group of aldehydes and ketones

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

An organosodium compound is not very reactive compared to a Grignard reagent

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

Grignard reagents are prepared in ether or tetrahydrofuran (THF)

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

Grignard reagents are decomposed by water and alcohol

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A An organosodium compound is not very reactive compared to a Grignard reagent
Answer: $B$
Explanation: It is supposed that the $M g - C$ bond is strongly polar covalent, not ionic. Grignard’s reagents are less reactive than organosodium, -potassium and -lithium compounds, that is the reason why it is more convenient to work with them.

Suggest Corrections

thumbs-up

0

Similar questions

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 ?

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)

Show how are the following alcohols prepared by the reaction of a suitable Grignard reagent and aldehyde/ketone?

Q. Assertion :Hydroxy ketones are not directly used in Grignard reaction. Reason: Grignard reagents reacts with hydroxyl group.

Q. The aldehydes which will not form Grignard product with one equivalent Grignard reagents are:

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Alkynes - Chemical Properties

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Polymerisation of Alkynes

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon