State Saytzeff rule. Give example.

Explanation

In dehydrohalogenation reactions, the preferred product is that alkene which has the greater number of alkyl groups attached to the douby bonded carbon atoms.
Ex : 2 - Bromopentane gives pent-2-ene as the product, instead f pent-1-ene.
`{:(" "Br),(" |"),(CH_(3)-underset("2-Bromopentane")(CH_(2)-CH_(2))-CH-CH_(3)overset(OH^(-))rarrCH_(3) - underset("Pent-2-ene")(CH_(2)-CH=)CH-CH_(3)):}`