Atom_BondOrdering Property

CDXML Name:BondOrdering
CDX Constant Name:kCDXProp_Atom_BondOrdering
CDX Constant Value:0x0431
Data Size:CDXObjectIDArray
Property of objects:kCDXObj_Node
First written/read in:ChemDraw 4.0 / 6.0


An ordering of the bonds to this node, used for stereocenters, fragments, and named alternative groups with more than one attachment.

An array of bond IDs. For stereocenters, it defines the stereochemistry about this atom. The interpretation depends on the kCDXProp_Atom_Geometry. For nodes with a kCDXProp_Node_Type of NamedAlternativeGroup or Fragment, it defines the correspondence between the bonds to this node and the external connection points defined for the fragments.

If this property is absent:

The order of the bonds to this node is not considered to be significant.


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