Question

Zaitsev or Saytzeff’s rule is applicable in elimination reaction.
A.True
B.False

Answer 1

Hint:To answer this question you must be able to recall the Saytzeff rule. This rule is used commonly in organic chemistry and helps in prediction of the major produced alkenes. It justifies the formation of a more substituted product in a reaction.

Complete step by step solution:
The Saytzeff’s rule, (also called Zaitsev rule or Saytzev’s rule) is a rule used in organic chemistry to predict the favored alkene product formed during an elimination reaction. It was given by a Russian chemist Alexander Zaitsev who observed a general trend in the products formed during an elimination reaction.
He stated that, in an elimination reaction, the formation of that alkene is favored that corresponds to the removal of hydrogen atom from the adjacent carbon (alpha carbon) that has the least number of hydrogen substituents. In scientific terms, the rule states that among two or more possible alkene structures, the more substituted alkene is obtained as the major product in an elimination reaction.
The Saytzeff’s rule specifies only the regiochemistry of an elimination reaction and does not make any generalizations about the stereochemistry of the products so formed.
Thus, the given statement is true.

Thus, the correct option is A.

Note:
In an elimination reaction, it is sometimes possible that the product formed does not correspond with that predicted by the Saytzeff’s rule, that is, a less substituted alkene is obtained as the product. This product is known as the Hoffman product. It is formed due to steric reasons, which can be either the presence of a bulky group at the more substituted alpha carbon or by the use of a bulky base which preferably abstract the outer proton forming a less substituted product. Thus, it is necessary to check the sterics of the reaction while writing the product.