Chemfig is a

LaTeX Latex is an emulsion (stable dispersion) of polymer microparticles in water. Latices are found in nature, but synthetic latices are common as well. In nature, latex is found as a wikt:milky, milky fluid, which is present in 10% of all floweri ...

package used for creating graphical representations of

chemical structure 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 m ...

molecule A molecule is a group of two or more atoms that are held together by Force, attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemi ...

s, reaction schemes, and

structural formula 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. The chemical bonding within the molecule is al ...

s. It provides a simple and flexible

syntax In linguistics, syntax ( ) is the study of how words and morphemes combine to form larger units such as phrases and sentences. Central concerns of syntax include word order, grammatical relations, hierarchical sentence structure (constituenc ...

to define

atoms Atoms are the basic particles of the chemical elements. An atom consists of a nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished from each other ...

, bonds,

angles Angles most commonly refers to: *Angles (tribe), a Germanic-speaking people that took their name from the Angeln cultural region in Germany *Angle, a geometric figure formed by two rays meeting at a common point Angles may also refer to: Places ...

, rings. It allows for the construction of both organic and inorganic molecules using LaTeX markup.

Features

* Customizable

bond angles Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well as bond lengths, bond angles, torsional angles and any other geometrical parameters that deter ...

and lengths * Support for single, double, triple, and

aromatic In organic chemistry, aromaticity is a chemical property describing the way in which a conjugated system, conjugated ring of unsaturated bonds, lone pairs, or empty orbitals exhibits a stabilization stronger than would be expected from conjugati ...

bonds *

Cyclic compound A cyclic compound (or ring compound) is a term for a compound in the field of chemistry in which one or more series of atoms in the compound is connected to form a ring. Rings may vary in size from three to many atoms, and include examples where ...

s and ring structures * Reaction arrows and mechanisms * Integration with

TikZ PGF/Ti''k''Z is a pair of languages for producing vector graphics (e.g., technical illustrations and drawings) from a geometric/algebraic description, with standard features including the drawing of points, lines, arrows, paths, circles, ellipse ...

for advanced diagramming and mhchem for typesetting chemical equations * Support for submolecules and nested chemical environments

Syntax

Package preamble: \input chemfig.tex \usepackage Chemfig uses a simple syntax based on TeX commands. For example: \chemfig Produces a structural formula for

acetic acid Acetic acid , systematically named ethanoic acid , is an acidic, colourless liquid and organic compound with the chemical formula (also written as , , or ). Vinegar is at least 4% acetic acid by volume, making acetic acid the main compone ...

and a structure would render as: There are 9 different bond types: \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ \chemfig\\ Methane chemfig

Molecular angles of a

methane Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The abundance of methane on Earth makes ...

molecule:
\chemfig

References

{{reflist

External links

Chemfig on CTAN

Wikibooks on chemfig and chemical graphics

chemfig software package
Free chemistry software Free TeX software

Features

Syntax

See also

References

External links