Question

give precautions in the preparations
grignard reagent. Also show the preparation
of Ethane sulphinic acid by using
grignard reagent​

Answer 1

Answer:

What are Grignard reagents?

A Grignard reagent has a formula RMgX where X is a halogen, and R is an alkyl or aryl (based on a benzene ring) group. For the purposes of this page, we shall take R to be an alkyl group.

A typical Grignard reagent might be CH3CH2MgBr.

The preparation of a Grignard reagent

Grignard reagents are made by adding the halogenoalkane to small bits of magnesium in a flask containing ethoxyethane (commonly called diethyl ether or just "ether"). The flask is fitted with a reflux condenser, and the mixture is warmed over a water bath for 20 - 30 minutes.

Everything must be perfectly dry because Grignard reagents react with water

Explanation:

Answer 2

Answer:

never boil ether on dryness ; be aware of. grignard reagent and related metal organics decompose rapidly in protic solvents like water