Question

Define Isomerism and explain Geometrical isomerism in alkene.

Answer 1

Two or more compounds having the same molecular formula are called isomers. This property is called isomerism.

Geometrical isomerism is alkenes.

Alkenes exhibit geometrical isomerism due to possibility of different geometrical arrangements in space as rotation about.the double bond is restricted,

$i)Cis$ $form:$ If the identical atoms or group lie on the same side of the double bond , the isomer is called cis-form. guve a look at the figure 1.

$ii)trans$ $form:$ If the identical atoms or groups lie on the opposite side of the double bond, the isomer is called trans-form. see the figure 2.