The structure editor by default draws single carbon bonds. If you click in the editor, it'll place a C, if you drag, it'll place a bond. Clicking on a drawn bond will add another bond (click twice for triple bond). Clicking on a node will add another bond off of that node.
You'll know if you're clicking on a node or a bond because a node will highlight with a red circle, while a bond will highlight the red line/bond:
Node Bond
Two menus are available to you with tools to assist in drawing substances. These menus can be dragged around, but their positions do not save.
Last updated 9/5/2025
Right Menu:
Commonly used elements you can select. Both the H and Cl expand to include additional elements(H: H, D, T Cl: Cl, F, Br, I).
Left Menu:
Periodic Table: You can select any element on the periodic table, as well as Deuterium or Tritium.
Shortcuts: Insert different functional groups using the Shortcuts button (i.e. Ph, SO2H, OBu-t, and many more)
Variables: Allow some variability in your structure with the following variables:
Last updated 9/10/2025
The above shows all of the bond options available, two of those are expanded to show additional options.
I always recommend drawing the structure flat (no stereochemistry) so you're presented with all isomers that may be of interest. Adding stereochemistry can be really restricting and can potentially miss substances of interest.
Last 8/12/2025
The following are used insert rings of various sizes:
The bottom right ring with the n in it allows you to specify how many sides you want a carbon ring to have, you can specify between 3 and 15.
Last updated 8/12/2025
Lasso (top left): Draw around a certain part or parts of a structure in order to select and drag around the canvas. I only use this tool when I want to delete a certain part of a structure. Once you've drawn around it, you can simply click DEL on your keyboard and it'll be erased.
Marquee (top right): Double click on a structure to highlight in its entirety, you can then move around the canvas or delete.
You can CTRL+ C and CTRL+V to copy and paste structures within the structure editor. Using the Lasso or Marquee is very helpful if you're trying to copy parts of a structure or the entire thing.
Pencil (bottom left): Draw atoms, if this is selected then you're able to place atoms on the canvas
Eraser (bottom right): Use to erase bonds and/or nodes
Last updated 9/11/2025
