PubChem
PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, …
Chemical structure - Wikipedia
A chemical structure of a molecule is a spatial arrangement of its atoms and their chemical bonds. Its determination includes a chemist 's specifying the molecular geometry and, when feasible and necessary, the electronic structure of the target molecule or other solid.
Chemical Sketch Tool - RCSB PDB
Use the Chemical Sketch tool to draw or edit a molecule. The resulting SMILES or InChI string may be used to search for matching molecules in the PDB Chemical Component Dictionary. Note that matches will include any chemical component in the dictionary, including polymeric ones like Alanine or Adenosine.
MolView
Click one of the subjects below to learn more. You can also watch some videos on YouTube to get started. Selection tools: all these tool can be used to drag the current selection or …
Molecule | Definition, Examples, Structures, & Facts | Britannica
Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Learn more about the properties and structures of molecules in this article.
4.4: The Shapes of Molecules - Chemistry LibreTexts
6 天之前 · The structure that includes only the placement of the atoms in the molecule is called the molecular structure (or molecular shape). The electron group geometries will be the same as the molecular structures when there are no lone electron pairs around the central atom, but they will be different when there are lone pairs present on the central ...
Home | 3DChem.com - Chemistry, Structures & 3D Molecules
See the structures of small molecules, medical drugs, biological super-structures - enzymes, proteins, DNA, & virus - and the material world nano structures, all with colourful illustrations and interactive 3D.
Molecular Structure and Function - Opportunities in Biology
The primary structure is the covalent chemical structure, that is, a specification of the identity of all the atoms and the bonds that connect them. The major molecules with which we work—proteins, nucleic acids, and carbohydrates— usually consist of linear arrays of units, each of which has a similar overall structure; they differ only in ...
Geometry of Molecules - Chemistry LibreTexts
2023年1月30日 · Molecular geometry, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule. Understanding the molecular structure of a compound can help determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity.
To understand why atoms form molecules. interpret the properties of elements that are important for life from the periodic table. understand why and how atoms form bonds. draw Lewis dot and line structures to represent chemical bonds. What is …