Explicit Hydrogen

Checker searches for explicit hydrogens.

The following different types of explicit hydrogens can be searched:
- Lonely : hydrogen atom without connection (:lonely=true)
- Isotopic : hydrogen isotopes (:isotopic=true)
- Charged : charged hydrogen atoms (:charged=true)
- Radical : hydrogen radicals (:radical=true)
- Mapped : mapped hydrogens (:mapped=true)
- Wedged : hydrogen connecting with wedged bond (:wedged=true)
- H Connected : hydrogen connected to a hydrogen atom (:hconnected=true)
- Polymer End Group : hydrogen connected to a SRU S-group (:polymerendgroup=true)
- S-group End : hydrogen connected to a Superatom S-group (:sgroupend=true)
- S-group : hydrogen which is the only atom in an S-group (:sgroup=true)
- Valence Error : hydrogen connected to an atom which has valence error (:valenceerror=true)
- Bridgehead : hydrogen connected to a bridgehead atom (:bridgehead=true)

This picture summarizes the applied categorizations:

images/download/attachments/1806488/explicit_H_types.png

The corresponding fixer offers removing explicit hydrogens and the selected special atoms (removeexplicith).

Example :

Explicit Hydrogen Checker (explicith) Warning: Fix

Remove Explicit Hydrogen (removeexplicith)

Detect Explicit Hydrogen ex_explh_ch ex_explh_f