tikz.dev / chemfig Manual

chemfig

chemfig

A TeX package for drawing molecules, version 1.82 (2026/09/19)
Unofficial HTML Version
This HTML version of the documentation is maintained by Dominik Peters, and is generated from the LaTeX sources of the manual.
Author of the chemfig manual: Christian Tellechea.
ctan.org/pkg/chemfig
Compiled outputCompiled outputCompiled output

Contents

Introduction

  1. 1New in v1.8
  2. 2Presenting chemfig
  3. 3Acknowledgment

Operation of chemfig

  1. 1The \chemfig macro
  2. 2Groups of atoms
  3. 3First atom’s role
  4. 4Different types of bonds
  5. 5Bond angle
  6. 6Length of a bond
  7. 7Departure and arrival atoms
  8. 8Customization of bonds
  9. 9Connecting bonds
  10. 10Default values
  11. 11Branches
  12. 12Connecting distant atoms
  13. 13Rings
  14. 14Representing electron movements
  15. 15Writing a name under a molecule
  16. 16Saving to a file

Advanced usage

  1. 1Separating atoms
  2. 2Displaying atoms
  3. 3Arguments given to tikz
  4. 4Shifted double bonds
  5. 5Delocalized double bonds
  6. 6Saving a sub-molecule
  7. 7Placement of Atoms
  8. 8The macro \charge
  9. 9Stacking
  10. 10Using \chemfig in the tikzpicture environment
  11. 11Annotated examples
  12. 12How to …

Reaction schemes

  1. 1Overview
  2. 2Arrow types
  3. 3Arrows features
  4. 4Compounds names
  5. 5Anchoring
  6. 6Compounds style
  7. 7Branching
  8. 8Subscheme
  9. 9Arrows optional arguments
  10. 10Arrows customization
  11. 11The \merge command
  12. 12The + sign

Horizontal reactions

  1. 1Syntax
  2. 2Placement of compounds
  3. 3Compound names
  4. 4Arrow labels
  5. 5Arrow types

List of commands

Gallery

Change history