Question

describe tha dehydrohalogenation method for preparation of alkene hindi me​

Answer 1

Answer:

The reactions are given above:

(i) 1-methylcyclohexene is the major product.

Only one alkene is formed at beta H atoms on either side of Br atoms are equivalent.

(ii) 2-methyl-2-butene is the major product.

Two different alkenes are formed. More substituted alkene is the major product as it is more stable. This is in accordance with Saytzeff's rule.

(iii) 3,4,4-Trimethylpent-2-ene is the major product.

Two different alkenes are formed. More substituted alkene is the major product as it is more stable. This is in accordance with Saytzeff's rule.

Answer 2

Answer:

In this reaction, dehydrohalogenation takes place i.e. a single molecule of halogen acid is removed. ... When such dihalides react with zinc metal, they lose halogen molecules which result in the formation of alkenes. Such a reaction of preparation of alkenes from Vicinal dihalides is known as dehalogenation