Groups-Repetition Units

Create a Repetition Unit or SRU Polymer

{info} When the repetition pattern is set to (ht) or eu and a single integer is specified as the repetition range, S-groups can be displayed as contracted multiple S-groups in the generated molecule source. The corresponding integrator setting must be used.

With the S-group Tool

1. Select the S-group tool, then select the structure you would like to group.

2. The S-group Dialog opens. Select the repetition pattern and specify the repetition range, then click OK.

3. After the dialog closes, the repetition unit is established.

With Selection

1. Select the structure you would like to group with one of the Selection Tools, then click the S-group tool.

2. The S-group Dialog opens. Select the repetition pattern and the repetition range you would like, then click OK.

3. After the dialog closes, the repetition unit is established.

{info} A structure is exported as a Link node when one atom has been selected and the repetition patter is the default value (ht) and the repetition count rage starts at 1.

Modifying a Repeating Unit

You can change the range and the pattern of the repetition by opening the S-group Dialog.

With the active S-group tool hover over the group on the canvas with the mouse cursor. When the elements of the group are highlighted in gray, left-click within the brackets.

In the opening S-group dialog, you can change the current values.

Deleting a Repeating Unit

Right-click on the structure within the brackets, then select Ungroup from the menu.

When you modify the atoms or bonds in the group, it will automatically ungroup.