The Wayback Machine - https://web.archive.org/web/20160913174115/http://www.cambridgesoft.com/services/documentation/sdk/chemdraw/cdx/properties/Bond_BondOrdering.htm

Bond_BondOrdering Property

CDXML Name:BondCircularOrdering
CDX Constant Name:kCDXProp_Bond_BondOrdering
CDX Constant Value:0x060B
Data Size:CDXObjectIDArray
Property of objects:kCDXObj_Bond
First written/read in:ChemDraw 6.0
Required?No

Description:

Ordered list of attached bond IDs.

This property is important for preserving stereochemistry in files that do not otherwise have coordinates. An array member value of zero means "no bond at this location", so an array like 5 0 7 0 indicates a trans bond.

This property is used only for bonds of order 2; accordingly, it may be considered either as a clockwise or counterclockwise ordering without affecting the meaning.

If this property is absent:

The ordering of bonds is not considered significant.

Note that this property is redundant with the positioning of Nodes, and may be safely omitted from any file with fully-defined node positions.

 

CDX Documentation index