From: Norman Geist (
Date: Wed Jan 25 2017 - 02:19:24 CST

As far as I know, the angle is defined D-A-H, so ideally it would be zero,
so IMHO you are right, the manual is wrong.


Norman Geist


Von: [] Im Auftrag von
Gesendet: Mittwoch, 25. Januar 2017 01:25
Betreff: vmd-l: HBonds Plugin - Hbonds criteria




I have a question regarding the criteria for the formation of hydrogen bond
in the VMD's Hbond plugin. Is there a mistake in the manual?


The manual says "A hydrogen bond is formed between an atom with a hydrogen
bonded to it (the donor, D) and another atom (the acceptor, A) provided that
the distance D-A is less than the cut-off distance (default 3.0 Angstroms)
and the angle D-H-A is less than the cut-off angle (default 20 degrees)."


Angle D-H-A is typically obtuse. Should it be angle H-D-A instead?