sample
------
Molecules
^^^^^^^^^
H2
F2
HF
HFHF

Reactions
^^^^^^^^^
| H2+F2: H2 + F2 -> 2HF (Hydrogenation of difluorine)
| HFHF: HFHF -> 2HF (Binding of hydrogen fluoride dimer)

Subsets of reactions
^^^^^^^^^^^^^^^^^^^^
non-covalent: ['HFHF']