Question

Draw the structure of an alcohol that could be used in an E1 reaction, ignoring rearrangements, to give the fallowing alkene as the major alkene product:

Answer 1

Concepts and reason

An organic reaction in which two substituents are removed from a molecule is known as an elimination reaction. There are two elimination reaction mechanisms namely ${{\rm{E}}_{\rm{1}}}$ and ${{\rm{E}}_2}$ .

Fundamentals

An elimination reaction involves the removal of a leaving group and beta hydrogen with respect to the leaving group which leads to a pi bond formation.

Example:

Two adjacent beta hydrogens are present.

${{\rm{E}}_{\rm{1}}}$ stands for an elimination unimolecular. The E1 reaction mechanism for alcohols involves three steps:

1.An acid-base reaction: protonation of the alcohol to make it a good leaving group.

2.Departure of the leaving group to form a carbocation intermediate

3.Deprotonation of beta hydrogen using a base yielding an alkene.

Ans: