A bond can be established by selecting an atom, then dragging from the atom which you would like to connect with a bond. The selected atom will be at the end of the established bond.
You can create the framework of complex structures with one move, without releasing the mouse button.
During drawing, gray dots appear indicating the potential directions for the next bond.
In the default case, these dots are the vertices of a hexagon, while they will be rearranged into a pentagon if you press down the
Dragging the cursor towards one of these dots, it becomes darker, showing the place of the newly forming atom.
When you release the left mouse button, you can add a new bond to your molecule.
While drawing a molecule, you can change the type of the last created atom by typing a new atomic symbol.
Special bond types
How to draw a Position variation bond
The variable atoms are highlighted with gray background; the darker highlight indicates that the atom is part of more than one position variation groups.
To identify which atom belongs to which group of attachment, you can hover over the bond in question, then a light blue frame will appear around the corresponding atoms.
With the selected bond tool, click the bond you would like to change.
Choose a bond tool by shortcut: If the cursor is over the canvas, typing a shortcut will select the appropriate bond mode (as a result, one of the Bonds buttons is activated).
If the cursor is over an existing bond, typing a shortcut will modify the type of the given bond only. In this case, the selected mode (the active button) will not change.
Repeated clicking on a bond with the same active bond tool can change its type.
If the selected bond type is Single, successive clicks on a bond will change its type from single to double and vice versa.
If Double bond type is selected, successive clicks on a bond will alternate its type between Double and Triple.
Clicking on a bond when the Drawing tool is active will change the bond type according to the Single-Double-Triple sequence.
Clicking on a directed bond (Single Up, Single Down, Single Up or Down, or Coordinate bond) will change the bond direction.
When more than one bonds are selected in a structure, selecting a new bond type will change every selected bond.
In the Bond properties dialog, you can set the bond type, the bond topology and the reacting center.
How to open Bond properties dialog?
You can open the dialog via the Bond properties context menu.
For more details, see Bond properties dialog page.
Select the Delete tool, then click on the bond which you would like to erase.
When you would like to erase more than one atoms with their bonds, choose the Delete tool and select the structure to be deleted. After releasing the left mouse button, the selected structure disappears from the canvas.
You can delete structures by selecting them and then clicking the Delete tool or pressing the
Delete keyboard button.