Question

How we can differentiate between identical molecule, enantiomers and diastereomers?

Answer 1

# The molecules which have similar structure , similar molecular formula and have superimposable mirror image are terms as identical molecules.

# molecules which have similar molecular formula but different structure( i.e different arrangements of atoms or groups in space) and have non- superimposable mirror image are terms as  enantiomers.

# molecules which have similar molecular formula and are not mirror images of each other and also non-superimposable mirror image are terms as diastereomers.

for e.g:-

str.l and ll are identical

Str.lll and lV are enantiomers and

Str. lll and V, and lV and V are diastereomers.