There are numerous N- and C-coordinated coordination modes of 1,2,3-triazole ligands.

The N3 coordination mode of 1,2,3-triazoles shows multiple catalytic activities.

Deprotonated C- or N-bonded triazole complexes show excellent catalytic properties.

1,2,3-Triazole complexes compare with imidazole and imidazolium ones in catalysis.

1,2,3-Triazole ligands combined with “biometals” largely provide “green” catalysis.