User guide

Adding from the start of an atom label creates bonds that try to attain the chain angle setting in the Drawing Set-
tings dialog box. If that angle cannot be attained, the next best angle is used.
Attachment points
You can draw polyhapto structures such as ferrocene ((Cp)
2
Fe), or abbreviated notations for different positional
isomers of a compound, using attachment points. The procedure is similar, and in both cases, the structure retains
chemical significance. You can generate all possible structures from an abbreviated combinatorial structure by using
Expand Generic Structure feature. For more information, see "Expand generic structures" on page 224.
Figure 7.4: Drawing a polyhapto structure
Multi-Center attachments
To add a multi-center attachment point to a structure:
1. Select all or part of the structure.
2. Go to Structure>Add Multi-Center Attachment. An asterisk indicates a multi-center node.
To draw a bond to a multi-center attachment point:
1. Click the bond tool.
2. Point to the asterisk and either click or drag to create a bond.
The asterisk is not visible once a bond is drawn to it. However, you can view the attachment point using a bond or
selection tool.
Tip: If fixed lengths is enabled, press ALT as you drag the bond.
Variable attachment points
You can use the Add Variable Attachment command to draw different positional isomers of a compound using an
abbreviated notation that retains chemical significance.
ChemBioDraw 13.0
Chapter 7: Advanced drawing techniques 99 of 401