|CDX Constant Name:||kCDXProp_Atom_RestrictImplicitHydrogens|
|CDX Constant Value:||0x0424|
|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.