Formed between a H-bond
acceptor and an H-bond
donor. The simplest case is familiar:
H2O, which is both an acceptor and a donor.
H-O ||| H-O
| |
H H
Where ||| represents the H-bond. Any polarisable hydrogen can be the donor for the bond, which may also be represented as donor|||H|||acceptor. This implies that the
proton is shared by both molecules.
More unusual examples of H bonds include aromatic ring interactions, where a hydrogen bonds weakly to the face of the ring:
|
H
_
_
__
/ \
\__/