The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing how the atoms are connected to one another. [1] Chemical structure describes the precise arrangement of atoms and the specific chemical bonds connecting them within a molecule, including their spatial organization in three dimensions. Understanding a molecule’s structure provides insights into its identity and behavior. Structural chemistry is a part of chemistry and deals with the connectivity and shape of individual chemical species, which includes molecules, ions, and polymers. Structure is central to understanding the behavior of chemical species, so the topic is foundational. A free chemical structure database providing fast text and structure search access to over 130 million structures from hundreds of data sources. The structural formula editor is surround by three toolbars which contain the tools you can use in the editor. Once you’ve drawn a molecule, you can click the 2D to 3D button to convert the molecule into a 3D model which is then displayed in the viewer. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more. Search by Structure or Substructure. Upload a structure file or draw using a molecule editor. PubChem supports chemical structure and molecular formula searching in the Compound collection. A structure search can start from a typed representation, a structure drawn in PubChem Sketcher, a Compound result item, or the structure represented by an existing Compound record. The chemical structure of a substance is the precise arrangement of atoms within a molecule or compound. This structural blueprint defines which atoms are present, how they are connected, and their specific positioning in three-dimensional space. The three different ways to draw organic molecules include Kekulé Formulas, Condensed Formulas, and Skeletal structures (also called line-bond structures or line formulas). During this course, you will view molecules written in all three forms.