In chemistry, isomers are molecules or polyatomic ions with identical molecular formula – that is, the same number of atoms of each element – but distinct arrangements of atoms in space. [1] Isomerism refers to the existence or possibility of isomers.

Isomers are molecules with the same molecular formulas, but different arrangements of atoms. There are several different types of isomers which will be described and a flowchart (see figure below) can help you determine which type of isomers are present.

Nov 17, 2022 · Because no bonds are broken in going from (a) to (d) or from (b) to (c), these alternative representations are not structural isomers. The three structural isomers—either (a) or (d), either (b) or (c), and (e)—have distinct physical and chemical properties.

Isomers are structures with the same molecular formula and chemical composition but different arrangements of atoms in space [1-4]. There are two main types of isomers: structural isomers and stereoisomers [1-8]. Structural isomers are also called constitutional isomers.

Apr 6, 2025 · Isomerism, the existence of molecules that have the same numbers of the same kinds of atoms (and hence the same formula) but differ in chemical and physical properties. Isomers are chemical compounds that have the same parts but are not the same. Learn more about isomerism in this article.

Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.

Jun 12, 2017 · Isomers are two molecules with the same molecular formula but differ structurally. Therefore, isomers contain the same number of atoms for each element, but the atomic arrangement differs.

Sep 10, 2018 · Here we explain the different types of isomers - constitutional, stereoisomers, enantiomers and diastereomers - and see how it's like family relationships.

Dec 3, 2018 · Isomers are molecules with the same atoms but arranged in different ways, giving them unique properties. Structural isomers differ in how atoms are joined, while stereoisomers differ in atom placement in space. Isomers are important in medicine since enzymes often work with only one kind of isomer.

Mar 21, 2025 · Isomers are molecules with the same molecular formulas, but different arrangements of atoms. A structural isomer is one in which two or more organic compounds have the same molecular formulas, but different structures.