Isomerism template

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Chain, position and functional-group isomers, cis/trans and E/Z, enantiomers and diastereomers with examples.

What the template shows

Same molecular formula, different structure: structural, geometric and optical isomers
Structural isomers
atoms joined in a different order
C₂H₆O · functional group
Dimethyl ether
Geometric isomers
no rotation about C=C
cis-But-2-ene
trans-But-2-ene
Maleic acid
(Z)-butenedioic acid
Fumaric acid
(E)-butenedioic acid
Optical isomers
enantiomers: non-superimposable mirror images
(R)-Lactic acid
(S)-Lactic acid
stereoisomers that are not mirror images
L-Tartaric acid
meso-Tartaric acid
A stereocentre is a carbon with four different groups; n stereocentres give at most 2ⁿ stereoisomers.
Enantiomers rotate plane-polarised light equally in opposite directions; a meso compound has an internal mirror plane.

Drawn with 90 atoms, 4 shapes – every one editable in MolDraw.

Sources

How to use this template

Press Edit in MolDraw. The template opens on the canvas of the free MolDraw editor.
Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need.
Add your own structures, arrows and text next to it, or combine several templates on one page.
Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers.

Frequently asked questions

Is the Isomerism template free?

Yes. The Isomerism template is one of the free MolDraw templates: open it in the editor or download it from this page as SVG or PNG and use it in your slides, worksheets and notes.

Can I edit the Isomerism template?

Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it.

Is the chemistry checked?

Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page.

Which functional groups are included?

Alkanes, alkenes, alkynes, arenes, alcohols, ethers, aldehydes, ketones, carboxylic acids and their derivatives, amines, nitriles and more, each with an example.