Atom Properties

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To assign properties to selected atoms in a structure:

1. Do one of the following:

• Select a single atom by clicking it with a selection tool.
• Select multiple atoms by Shift+clicking the atoms.

2. Do one of the following:

• Right-click, select the property you want, and then click the appropriate option.
• From the Structure menu, choose Atom Properties. The Atom Properties dialog box appears.
• Press the HotKey "/ ". The Atom Properties dialog box appears.

In the Atom Properties dialog box, select the properties to associate with the selected atom(s). Click OK.

Query indicators appear next to atoms that have associated atom properties.

The character that appears depends on which query properties have been assigned. If more than one property is assigned, more than one character appears adjacent to the atom. For more information, see "Query Indicators".

The atom property indicators are shown in the following table.

Indicator	Query Property
*	Substituents: Free Sites (followed by the number of free sites)
U	Substituents: Up to (followed by the maximum number of substituents)
X	Substituents: Exactly (followed by the number of substituents)
H	Implicit Hydrogens
R	Ring Bond Count
S	Unsaturation
C	Reaction Change
T	Reaction Stereo
L	Translation
I	Isotopic Abundance