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*   Editing Atom Properties
Use the Atom Properties dialog box to change the charge state or isotope of an atom or to change the entire element.
v
To edit only the element of a single atom
1.
2.
To change an element that has a single-character symbol—C, H, N, O, B, F, K, P, S, I, V, W, Y, U, and R— press the appropriate key on the keyboard.
–or–
To change to chlorine (Cl) or bromine (Br), use SHIFT+C or SHIFT+B, respectively.
The application applies the selected element symbol to the selected atom.
v
To edit the element, charge, radical, or nucleon number of a single atom
1.
Click the Atom Properties button, , and then click the atom you want to change.
–or–
Right-click and choose Default Mode from the shortcut menu, and then double-click the atom you want to change.
The Atom Properties dialog box opens.
2.
Make changes by clicking the appropriate Element button, selecting the Charge and Radical check boxes, or entering a value in the Nucleon Number box.
3.
a.
Click Periodic Table.
The Periodic Table opens. For additional information, see Report Creator.
b.
c.
4.
Changes you make in the Atom Properties dialog box affect only the selected atom.
v
To edit only the element of multiple atoms
1.
You can change only the element of multiple atoms. You cannot change the other parameters available on the Atom Properties dialog box.
2.
To change an element that has a single-character symbol—C, H, N, O, B, F, K, P, S, I, V, W, Y, U, and R— press the appropriate key on the keyboard.
–or–
To change to chlorine (Cl) or bromine (Br), use SHIFT+C or SHIFT+B, respectively.
The element symbol is applied to all selected atoms.
v
To replace an element with a substituent
1.
Click the Atom Properties button, , and then click the atom you want to change.
–or–
Right-click and choose Default Mode from the shortcut menu, and then double-click the atom you want to change.
The Atom Properties dialog box opens.
2.
Click R-Substituent.
The Substituent Index area appears in the dialog box.
3.
4.
The symbol “R” represents a substituent. Substructure search and fragments generation algorithms consider substituents with identical indexes as equal and substituents with different indexes as not equal. For additional information, see Fragments and Mechanisms Module.
When searching structures with substituents, specific search rules apply. For additional information, see (Sub)Structure Search Rules.


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Related Topics:
  Selecting Atoms and Bonds
  Editing Bond Properties
  Understanding Unspecified Bond Locations
  Understanding Unspecified Charge Sites
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