Chemfig
Chemfig is a LaTeX package used for creating graphical representations of chemical structures, molecules, reaction schemes, and structural formulas. It provides a simple and flexible syntax to define atoms, bonds, angles, rings. It allows for the construction of both organic and inorganic molecules using LaTeX markup.
Features
- Customizable bond angles and lengths
- Support for single, double, triple, and aromatic bonds
- Cyclic compounds and ring structures
- Reaction arrows and mechanisms
- Integration with TikZ for advanced diagramming and mhchem for typesetting chemical equations
- Support for submolecules and nested chemical environments
Syntax
Package preamble:
\input chemfig.tex
\usepackage{chemfig}Chemfig uses a simple syntax based on TeX commands. For example:
\chemfig{H-C(-[2]H)(-[6]H)-C(=O)-OH}Produces a structural formula for acetic acid and a structure would render as: 
There are 9 different bond types: 
\chemfig{A-B}\\
\chemfig{A=B}\\
\chemfig{A~B}\\
\chemfig{A>B}\\
\chemfig{A<B}\\
\chemfig{A>:B}\\
\chemfig{A<:B}\\
\chemfig{A>{{!}}B}\\
\chemfig{A<{{!}}B}\\ 
Molecular angles of a methane molecule:
\chemfig{C(-[:0]H)(-[:90]H)(-[:180]H)(-[:270]H)}See also
- Comparison of TeX editors
- Computational chemistry
- Jmol - molecular modelling of chemical structures in 3 dimensions
- List of TeX extensions
- mhchem
- Molecular geometry
- Molecular graphics
- Overleaf - web app that does chemfig package chemical structures
- TikZ
- XyMTeX - another LaTeX structural formula package
External links