Question

explain configurational isomerism​

Answer 1

Configurational isomers are stereoisomers that can cannot be converted into one another by rotation around a single bond. ... The two main types of configurational isomers are geometric isomers and optical isomers.

Answer 2

Two molecules with the same constitution but different configuration (i.e. – same IUPAC name for constitution, different IUPAC prefix for configuration). Configurational isomers cannot be interconverted without breaking bonds