Chapter 7, Problem 3PP

Interpretation Introduction

Interpretation:

The structure of each alkene is to be drawn and classified on the basis of substitution on the double bond, the structure of product formed from each alkene on hydrogenation is to be written, the heat of hydrogenation can be used to relate the relative stabilities of alkenes or not and the order of stability of alkenes are to be predicted, the possible isomers of given alkenes and the order of their relative stabilities are to be determined.

Concept introduction:

Hydrogenation of alkenes or alkynes is an addition reaction, which is done in the presence of reducing agents, such as ${\text{H}}_2/Ni$.

Stability of the isomers is inversely proportional to the steric hindrance. The more the steric hindrance, the lesser will be the stability of isomer.