and
are
Positional
Chain
Geometrical
Functional
geometrical isomers -
Compounds having some molecular formula but a diffrent geometric arrangement . This phenomenon appears in case of unsaturated compounds or ring compounds in which rotaion around a carbon bond is restricted
- wherein
Positional isomers are constitutional isomers that have the same carbon skeleton and the same functional groups but differ from each other in the location of the functional groups on or in the carbon chain.