You can draw link nodes using the popup menu in two ways:
- Right-click on the atom to bring up the popup menu.
- Select the required repetition number from the Link node submenu. Marvin finds out the outer (non-repeating) bonds for you.
- Select the atom you would like to be the link node and two neighboring bonds for outer (non-repeating) bonds.
- Right-click anywhere on the canvas to bring up the popup menu.
- Select the required repetition number from the Link node submenu.
If it is not possible to create a link node for the specified configuration (for example at ring fusions) an error message is thrown.
Outer (non-repeating) bonds will be denoted by brackets crossing them, and the repetition numbers will be put on the atom.
All portion of the molecule connected to the link atom through non-outer bonds are supposed to repeat together with the atom.
See examples below.
| Molecule with link node | Meaning |
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To edit a link node repetition number or change outer bonds, repeat the drawing steps above.
To make a link atom ordinary atom again, select Off from the Link node submenu.