Defining Nicknames

---

To define your own Nicknames, you must have ChemDraw Pro.

You can define Nicknames with one or two attachment points. The attachment points must be single bonds.

To define a new Nickname:

1. Create a structure containing the functional group you want to define as a Nickname.

2. Select the functional group.

You must indicate the connection point for the functional group by selecting the new fragment without the bond connected to the attachment point.

NOTE: If stereochemistry is indicated in a structure that you are defining as a Nickname, the stereochemistry is retained.

3. From the Structure menu, choose Define Nickname.

The number of connection points is shown by radicals in the Formula. You can have only one or two connection points in a nickname.

4. Type a short name for the Nickname.

5. Click OK.

The Nickname is defined.

If you use a Nickname that is the same as an element name, a message indicates that the element is replaced with the Nickname. For example, using Ac for an acetyl group replaces the element Actinium. The Check Structure command recognizes the label as an acetyl group rather than Actinium.

ChemDraw provides the following default Nickname/Element conflicts:

Symbol	Nickname	Element
Ac	Acetyl	Actinium
Am	Amyl	Americium
Np	para-Nitrophenyl	Neptunium
Pr	Propyl	Praeseodymium

To remove the overriding Nicknames, choose List Nicknames from the File menu and delete the overriding Nickname definition. For more information, see "Deleting Nicknames".