Compounds that have the same molecular formula but different structures are said to be
Answer Details
Compounds that have the same molecular formula but different structures are said to be isomeric. Isomers are molecules that have the same number and types of atoms but different arrangements of those atoms. This means that they have different physical and chemical properties, even though they have the same molecular formula. For example, butane and isobutane both have the molecular formula C4H10, but they have different structures and therefore different properties. This property of compounds to have same molecular formula but different structures is called isomerism.