ChemDraw User's Manual - CambridgeSoft

4. Click and drag from the atom label to drawyour bonds.Creating a Multi-CenterBondAdministratorPh CH 2 CH 2 CHCH 3You can determine the orientation of the resultingbond by dragging. If you click to add a bond, thereare several preferential orientations for the resultingbond as outlined below.• Adding from the end of an atom label createsbonds that are preferentially horizontal.• Adding from the middle of an atom labelcreates bonds that are preferentially vertical.• Adding from the start of an atom label createsbonds that try to attain the chain angle settingin the Drawing Settings dialog box. If thatangle cannot be attained, the next best angle isused.Using Multi-CenterBondsYou can draw, with chemical significance,polyhapto structures such as ferrocene ((Cp) 2 Fe).To create a multi-center attachment point:1. Select the structure whose center you wantdefined as a multi-center attachment point.2. From the Structure menu, choose AddMulti-Center Attachment.An asterisk is displayed with the fragment toshow that it contains a multi-center node.The asterisk is not visible once a bond is drawn toit. You can view the attachment point with a bondor selection tool. For more information, see“Viewing Attachment Points” on page 127.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 tocreate a bond.FeFeTo make the bond in ferrocene appear that it iscoming from within the ring:1. Double-click the wedged bond to make it comeforward.2. Select the downward bond.126•Advanced Drawing TechniquesCambridgeSoftUsing Multi-Center Bonds