Bond Characteristics on the QueryDef menu is used to define the following bond characteristics.
Bond types
Chain: search results include only structures containing chain bonds at the specified location.
Ring/Chain: search results include structures containing bonds in either rings or chains at the specified location. When you change a chain bond to a ring/chain bond, the atoms on either side of the bond are also set to ring/chain.
Ring: search results have a ring containing the bond at the specified location. This is the default type for ring bonds. When you change a chain bond to a ring bond, the atoms on either side of the bond are also set to ring. You cannot alter the bond type in a drawn ring.
Bond values
Exact/Normalized: search results match answers with either the exact bond value drawn or with normalized bonds
Exact: search results exactly match the bond value that is drawn.
Normalized: search results match only normalized bonds. This is the default for even membered rings with alternating single and double bonds and for tautomeric bonds.
Unspecified: search results will match with any bond value.
Mixture: the bond value when more than one bond is selected with different bond values. It is selected in the dialog but is still grayed, as it is not a user-selectable choice. Changing the bond value changes all selected bonds, regardless of previous settings.
Copyright
© 2017 American Chemical Society. All Rights Reserved.