Question

What happened when bromocyclohexane is treated with magnesium in presence of dry ether and the product is hydrolysed

Answer 1

Answer:

when bromocyclohexane is treated with Mg in the presence of dry ether, phenylmagnesiumbromide (C6H5MgBr) is formed and after hydrolysing this product, cyclohexane with MgBr(OH) i.e., Grignard reagent is produced.

Answer 2

Answer:

when bromocyclohexane is treated with magnesium in presence of dry ether and the product is hydrolysed it forms cyclohexane. The reagent is called Grignard Reagent.

Explanation:

Preparation of Grignard Reagent:

• By treating magnesium with organic halides like alkyl or aryl halides, these reagents are created.
• Solvents containing ethers (which have the formula R-O-R') are used for this because the ligands they give aid in the stability of the organomagnesium molecule.
• Water and air are extremely detrimental to this reaction and can quickly oxidize or protonate the Grignard reagent, which is a product of protonolysis. As a result, the procedure must be carried out in an atmosphere free of air.
• Instead, using wet solvents and ultrasonic, the magnesium can be activated to cause it to consume water.
• The reaction can become very exothermic after its slow induction phase. This is a crucial issue to take into account when manufacturing the Grignard reagent commercially.

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