ChemDraw User's Manual - CambridgeSoft

• Press the Ctrl or Command key whiledrawing chains in the direction you want.Changing Double BondsTo change one type of double bond to another:1. Click the Bold, Dashed, or Solid Bond tool.2. Point to one of the bonds in the double bond.NOTE: If Fixed Lengths is off, use Ctrl+Alt orCommand+Option to reverse chain direction. FixedAngles must be on to reverse direction.Editing BondsYou can modify the appearance of chemicalstructures by:• Changing bond types• Changing bond alignment and orientation• Moving atoms• Layering bonds• Changing the bond orderChanging Bond TypesTo change a single bond from one type to another:1. Click a bond tool.2. Point at the center of an existing bond andclick.The bond that you click changes to the newbond type.3. Click the bond.The double bond changes to the new bondtype. One of the bonds in the double bond isalways a solid or dashed bond.NOTE: If you click a tautomeric bond (solid/dashed) asecond time with the dashed bond tool, you create an aromaticdouble bond (dashed/dashed).Changing Orientation ofWedged and Dative BondsWhen you draw or change a bond to a wedged ordative bond, the orientation of the bond is chosenappropriately.To change the orientation:• Click the dative or wedged bond with the toolused to create it.CO 2 HHOHCH3ChemDraw 9 Drawing Chemical Structures • 69Editing Bonds