| CDXML Name: | FreeSites |
| CDX Constant Name: | kCDXProp_Atom_RestrictFreeSites |
| CDX Constant Value: | 0x0423 |
| Data Size: | UINT8 |
| Property of objects: | kCDXObj_Node |
| First written/read in: | ChemDraw 4.0 |
| Required? | No |
Description:
Indicates that up to the specified number of additional substituents are permitted on this atom.
A substituent is defined as some other node bonded to this one. It is strictly a count of attached bonds, and not a count of bond orders.
A value of zero indicates that the atom must be matched as drawn.
If this property is absent:
The node is treated as unrestricted in terms of free sites.