# Isomers ## Overview of Chemical Isomerism ![[Isomers 2022-12-05 10.41.49.excalidraw]] --- ![[isomersim-scheme-enantiomers-constitutional-isomers-diastreomers.png]] > [!info] Meaning of "Isomer" > The term **isomer** comes from the Greek words *isos* and *meros*, meaning "made of the same parts." **Constitutional Isomers** have the *same molecular formula* but *different connectivity* ## Constitutional Isomers ## Stereoisomers **Stereoisomers** have the *same molecular formula* and the *same connectivity* but *different spatial arrangement* of atoms **Geometric isomers** are stereoisomers that arise due to a restriction of