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, …

What is a Chemical Structure? Chemical Structure is the spatial arrangement of atoms in a molecule. Chemical structure determines the molecular geometry of the molecule. Russian Chemist Alexander Butlerov acknowledged that molecules are not random clusters of atoms and functional groups but are arranged in a concrete pattern. Types of Chemical ...

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.

A free chemical structure database providing fast text and structure search access to over 130 million structures from hundreds of data sources.

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 …

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.

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.

Chemical structures are the essential building blocks in organic chemistry. They make up the “words” of every organic chemistry sentence, so it is vital to understand how to read and write structures.

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.

2025年1月21日 · 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 ...