Atom_RestrictImplicitHydrogens Property

CDXML Name:ImplicitHydrogens
CDX Constant Name:kCDXProp_Atom_RestrictImplicitHydrogens
CDX Constant Value:0x0424
Data Size:CDXBooleanImplied
Property of objects:kCDXObj_Node
First written/read in:ChemDraw 4.0


Signifies that implicit hydrogens are not allowed on this atom.

This property is used when making queries. If implicit hydrogens are not allowed, the node may not match a target node that has any attached hydrogens. This property is redundant with the kCDXProp_Atom_RestrictSubstituentsUpTo and kCDXProp_Atom_RestrictSubstituentsExactly properties.

The value stored in this property exactly corresponds to the H0 property in ISIS.

If this property is absent:

Implicit hydrogens are allowed.


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