Stereochemistry, a subdiscipline of chemistry, involves the study of the relative spatial arrangement of atoms that form the structure of molecules and their manipulation. An important branch of stereochemistry is the study of chiral molecules. The study of stereochemistry focuses on stereoisomers and spans the entire spectrum of organic, inorganic, biological, physical, and especially supramolecular chemistry. The concept of isomerism is an important feature of the study of organic compounds. It relates to the existence of different compounds which have the same molecular formula but different properties. Such compounds are called isomers. The difference in properties of isomers is due to the difference in the relative arrangements of atoms in their molecules.