Question

what is stereoisomerism ? what are stereoisomeric pairs ?

Answer 1

Hi,

Compounds having the same molecular formula and having the same constitution and sequence of covalent bonds, but differing in relative positions of their atoms or groups in space are called stereoisomers. The phenomenon is called stereoisomerism.

It can be classified as geometrical and optical isomerism.

Geometrical isomerism is the cis- trans isomerism while optical isomerism is the isomerism which involves the mirror image. Thus such cis- trans pairs and mirror images are stereoisomeric pairs.